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postfix-2.0.16-20031226

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Wietse Venema 2003-12-26 00:00:00 -05:00 committed by Viktor Dukhovni
parent 468e9bae3d
commit e14a8a626a
37 changed files with 616 additions and 453 deletions
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20
postfix/HISTORY
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@ -8920,14 +8920,28 @@ Apologies for any names omitted.
Cleanup: eliminated binary hashes from anvil server. Anvil
client information is now stored on top of its VSTREAM.
20031226
Feature: bounce_queue_lifetime parameter (default:
$maximal_queue_life_time) that bounds the time that
MAILER-DAEMON messages spend in the queue before they are
considered undeliverable.
Feature: disable "mail loops back to myself" protection
when SMTP mail is sent to a non-standard port. This makes
setting up content filters less painful.
Cleanup: disallow bare x.x.x.x numeric IP addresses in
email addresses. The form user@[x.x.x.x] is still allowed.
Cleanup: cleaned up the naming of internal symbols in the
SMTP client.
Open problems:
Low: in the SMTP client, pass the session, request and
state structures as separate arguments.
Low: in the SMTP client, turn off "mail loops back to
myself" detection if a non-default TCP port is specified.
High: when virtual aliasing is turned off after content
filtering, local submissions may escape virtual aliasing.

4
postfix/README_FILES/SMTPD_PROXY_README
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@ -122,7 +122,7 @@ for testing, of course.
smtp inet n - n - - smtpd
-o smtpd_proxy_filter=26
:26 inet n - n - - smtpd
-o smtpd_authorized_xclient_hosts=127.0.0.0/8
-o smtpd_authorized_xforward_hosts=127.0.0.0/8
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
@ -135,7 +135,7 @@ Note: do not specify spaces around the "=" or "," characters.
The ":26" causes Postfix to listen on the localhost address only.
DO NOT expose the secondary SMTP server to the Internet :-)
The smtpd_authorized_xclient_hosts parameter allows the before
The smtpd_authorized_xforward_hosts parameter allows the before
filter SMTP server to forward remote SMTP client information to
the after-filter SMTP server, so that the after-filter Postfix
daemons log the remote SMTP client information instead of logging

21
postfix/README_FILES/XCLIENT_README
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@ -22,7 +22,7 @@ server's Received: message header.
style content filter applications, the filter can be simplified if
it can delegate decisions concerning mail relay and other access
control to the MTA. This is especially useful when the filter acts
as a transparent proxy for SMTP commands. As in the first example,
as a transparent proxy for SMTP commands. As in the other examples,
this requires that the filter can override the MTA's idea of the
SMTP client hostname, network address, and other information.
@ -68,8 +68,8 @@ is not enclosed with [].
The PROTO attribute specifies either SMTP or ESMTP.
The HELO attribute specifies a HELO parameter value, or the value
[UNAVAILABLE] when the information is unavailable.
The HELO attribute specifies an SMTP HELO parameter value, or the
value [UNAVAILABLE] when the information is unavailable.
Note 1: syntactically valid NAME and HELO attributes can be up to
255 characters long. The client must not send XCLIENT commands that
@ -81,16 +81,15 @@ upper case, lower case or mixed case.
Security
========
The XCLIENT command changes audit trails and/or client access
The XCLIENT command changes audit trails and/or SMTP client access
permissions. Use of this command must be restricted to authorized
clients.
The XCLIENT should not override its own access control mechanism.
SMTP clients. However, the XCLIENT command should not override its
own access control mechanism.
SMTP connection caching
=======================
SMTP connection caching makes it possible to deliver multiple
messages within the same SMTP session. The XCLIENT attributes are
persistent across an SMTP session, and need to be reset as appropriate
in between deliveries.
XCLIENT attributes persist until the end of an SMTP session. If
one session is used to deliver mail from different SMTP clients,
the XCLIENT attributes need to be reset as appropriate in between
deliveries.

9
postfix/README_FILES/XFORWARD_README
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@ -12,11 +12,12 @@ remote client and/or message identifying information through the
content filter to MTA2, so that the information could be logged as
part of mail handling transactions.
This extension is implemented as a separate command, so that it
can be used to transmit client or message attributes incrementally.
It is not implemented by passing additional parameters via the MAIL
This extension is implemented as a separate command, and can be
used to transmit client or message attributes incrementally. It
is not implemented by passing additional parameters via the MAIL
FROM command, because doing so would require extending the MAIL
FROM command length limit by another 600 or more characters.
FROM command length limit by another 600 or more characters beyond
the space needed by other extensions such as AUTH.
Command syntax
==============

11
postfix/RELEASE_NOTES
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@ -22,6 +22,17 @@ snapshot release). Patches change the patchlevel and the release
date. Snapshots change only the release date, unless they include
the same bugfixes as a patch release.
Incompatible changes with Postfix snapshot 2.0.16-20031226
==========================================================
Postfix no longer allows mail addresses with bare numeric IP
addresses (user@1.2.3.4). The form user@[ipaddress] is still
allowed.
Bounce messages now have a separate queue life time. This is
controlled by the bounce_queue_lifetime parameter. The default is
$maximal_queue_life_time.
Incompatible changes with Postfix snapshot 2.0.16-20031223
==========================================================

12
postfix/conf/sample-rate.cf
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@ -46,6 +46,18 @@ maximal_backoff_time = 4000s
#
maximal_queue_lifetime = 5d
# The bounce_queue_lifetime parameter specifies the maximal time
# a bounce message is queued before it is considered undeliverable.
# By default, this is the same as the queue life time for regular
# mail.
#
# Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks).
# The default time unit is d (days).
#
# Specify 0 when mail delivery should be tried only once.
#
bounce_queue_lifetime = $maximal_queue_lifetime
# The minimal_backoff_time parameter specifies the minimal time
# between attempts to deliver a deferred message. This parameter
# also limits the time an unreachable destination is kept in the

86
postfix/html/nqmgr.8.html
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@ -1,4 +1,4 @@
<html> <head> </head> <body> <pre>
<html> <body> <pre>
NQMGR(8) NQMGR(8)
<b>NAME</b>
@ -111,25 +111,25 @@ NQMGR(8) NQMGR(8)
actions (the message is followed by the symbolic constant
used internally by the software):
<b>D (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>SCAN</b><i>_</i><b>DEFERRED)</b>
<b>D (QMGR_REQ_SCAN_DEFERRED)</b>
Start a deferred queue scan. If a deferred queue
scan is already in progress, that scan will be
restarted as soon as it finishes.
<b>I (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>SCAN</b><i>_</i><b>INCOMING)</b>
<b>I (QMGR_REQ_SCAN_INCOMING)</b>
Start an incoming queue scan. If an incoming queue
scan is already in progress, that scan will be
restarted as soon as it finishes.
<b>A (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>SCAN</b><i>_</i><b>ALL)</b>
<b>A (QMGR_REQ_SCAN_ALL)</b>
Ignore deferred queue file time stamps. The request
affects the next deferred queue scan.
<b>F (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>FLUSH</b><i>_</i><b>DEAD)</b>
<b>F (QMGR_REQ_FLUSH_DEAD)</b>
Purge all information about dead transports and
destinations.
<b>W (TRIGGER</b><i>_</i><b>REQ</b><i>_</i><b>WAKEUP)</b>
<b>W (TRIGGER_REQ_WAKEUP)</b>
Wakeup call, This is used by the master server to
instantiate servers that should not go away for-
ever. The action is to start an incoming queue
@ -159,7 +159,7 @@ NQMGR(8) NQMGR(8)
Corrupted message files are saved to the <b>corrupt</b> queue for
further inspection.
Depending on the setting of the <b>notify</b><i>_</i><b>classes</b> parameter,
Depending on the setting of the <b>notify_classes</b> parameter,
the postmaster is notified of bounces and of other trou-
ble.
@ -176,54 +176,54 @@ NQMGR(8) NQMGR(8)
command after a configuration change.
<b>Miscellaneous</b>
<b>allow</b><i>_</i><b>min</b><i>_</i><b>user</b>
<b>allow_min_user</b>
Do not bounce recipient addresses that begin with
'-'.
<b>queue</b><i>_</i><b>directory</b>
<b>queue_directory</b>
Top-level directory of the Postfix queue.
<b>Active queue controls</b>
In the text below, <i>transport</i> is the first field in a <b>mas-</b>
<b>ter.cf</b> entry.
<b>qmgr</b><i>_</i><b>clog</b><i>_</i><b>warn</b><i>_</i><b>time</b>
<b>qmgr_clog_warn_time</b>
Minimal delay between warnings that a specific des-
tination is clogging up the active queue. Specify 0
to disable.
<b>qmgr</b><i>_</i><b>message</b><i>_</i><b>active</b><i>_</i><b>limit</b>
<b>qmgr_message_active_limit</b>
Limit the number of messages in the active queue.
<b>qmgr</b><i>_</i><b>message</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<b>qmgr_message_recipient_limit</b>
Limit the number of in-memory recipients.
This parameter also limits the size of the short-
term, in-memory destination cache.
<b>qmgr</b><i>_</i><b>message</b><i>_</i><b>recipient</b><i>_</i><b>minimum</b>
<b>qmgr_message_recipient_minimum</b>
Per message minimum of in-memory recipients.
<b>default</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<b>default_recipient_limit</b>
Default limit on the number of in-memory recipients
per transport.
<i>transport_</i><b>recipient</b><i>_</i><b>limit</b>
<i>transport</i><b>_recipient_limit</b>
Limit on the number of in-memory recipients, for
the named message <i>transport</i>.
<b>default</b><i>_</i><b>extra</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<b>default_extra_recipient_limit</b>
Default limit on the total number of per transport
in-memory recipients that the preempting messages
can have.
<i>transport_</i><b>extra</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<i>transport</i><b>_extra_recipient_limit</b>
Limit on the number of in-memory recipients which
all preempting messages delivered by the transport
<i>transport</i> can have.
<b>Timing controls</b>
<b>minimal</b><i>_</i><b>backoff</b><i>_</i><b>time</b>
<b>minimal_backoff_time</b>
Minimal time in seconds between delivery attempts
of a deferred message.
@ -231,52 +231,56 @@ NQMGR(8) NQMGR(8)
destination is kept in the short-term, in-memory
destination status cache.
<b>maximal</b><i>_</i><b>backoff</b><i>_</i><b>time</b>
<b>maximal_backoff_time</b>
Maximal time in seconds between delivery attempts
of a deferred message.
<b>maximal</b><i>_</i><b>queue</b><i>_</i><b>lifetime</b>
Maximal time in days a message is queued before it
is sent back as undeliverable.
<b>maximal_queue_lifetime</b>
Maximal time (default: in days) a regular message
is queued before it is considered undeliverable.
<b>queue</b><i>_</i><b>run</b><i>_</i><b>delay</b>
<b>bounce_queue_lifetime</b>
Maximal time (default: in days) a bounce message is
queued before it is considered undeliverable.
<b>queue_run_delay</b>
Time in seconds between deferred queue scans. Queue
scans do not overlap.
<b>transport</b><i>_</i><b>retry</b><i>_</i><b>time</b>
<b>transport_retry_time</b>
Time in seconds between attempts to contact a bro-
ken delivery transport.
<b>Concurrency controls</b>
<b>initial</b><i>_</i><b>destination</b><i>_</i><b>concurrency</b>
<b>initial_destination_concurrency</b>
Initial per-destination concurrency level for par-
allel delivery to the same destination.
<b>default</b><i>_</i><b>destination</b><i>_</i><b>concurrency</b><i>_</i><b>limit</b>
<b>default_destination_concurrency_limit</b>
Default limit on the number of parallel deliveries
to the same destination.
<i>transport_</i><b>destination</b><i>_</i><b>concurrency</b><i>_</i><b>limit</b>
<i>transport</i><b>_destination_concurrency_limit</b>
Limit on the number of parallel deliveries to the
same destination, for delivery via the named mes-
sage <i>transport</i>.
<b>Recipient controls</b>
<b>default</b><i>_</i><b>destination</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<b>default_destination_recipient_limit</b>
Default limit on the number of recipients per mes-
sage transfer.
<i>transport_</i><b>destination</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<i>transport</i><b>_destination_recipient_limit</b>
Limit on the number of recipients per message
transfer, for the named message <i>transport</i>.
<b>Message scheduling</b>
<i>transport_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>cost</b> (valid range: 0,2,3...)
<i>transport</i><b>_delivery_slot_cost</b> (valid range: 0,2,3...)
This parameter basically controls how often a mes-
sage delivered by <i>transport</i> can be preempted by
another message. An internal per-message/transport
counter is incremented by one for each <i>trans-</i>
<i>port_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>cost</b> deliveries handled by
<i>port</i><b>_delivery_slot_cost</b> deliveries handled by
<i>transport</i>. This counter represents the number of
"available delivery slots" for use by other mes-
sages. Current message can be preempted by another
@ -287,32 +291,32 @@ NQMGR(8) NQMGR(8)
Value equal to 0 disables the message preemption
for <i>transport</i>.
<i>transport_</i><b>minimum</b><i>_</i><b>delivery</b><i>_</i><b>slots</b>
<i>transport</i><b>_minimum_delivery_slots</b>
Message preemption is not attempted at all whenever
a message that can't ever accumulate at least
<i>transport_</i><b>minimum</b><i>_</i><b>delivery</b><i>_</i><b>slots</b> available delivery
<i>transport</i><b>_minimum_delivery_slots</b> available delivery
slots is being delivered by <i>transport</i>.
<i>transport_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>discount</b> (valid range: 0..100)
<i>transport</i><b>_delivery_slot_discount</b> (valid range: 0..100)
<i>transport_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>loan</b>
<i>transport</i><b>_delivery_slot_loan</b>
These parameters speed up the moment when a message
preemption can happen. Instead of waiting until
the full amount of delivery slots required is
available, the preemption can happen when <i>trans-</i>
<i>port_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>discount</b> percent of the required
amount plus <i>transport_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>loan</b> still
<i>port</i><b>_delivery_slot_discount</b> percent of the required
amount plus <i>transport</i><b>_delivery_slot_loan</b> still
remains to be accumulated. Note that the full
amount will still have to be accumulated before
another preemption can take place later.
<b>default</b><i>_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>cost</b>
<b>default_delivery_slot_cost</b>
<b>default</b><i>_</i><b>minimum</b><i>_</i><b>delivery</b><i>_</i><b>slots</b>
<b>default_minimum_delivery_slots</b>
<b>default</b><i>_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>discount</b>
<b>default_delivery_slot_discount</b>
<b>default</b><i>_</i><b>delivery</b><i>_</i><b>slot</b><i>_</i><b>loan</b>
<b>default_delivery_slot_loan</b>
Default values for the transport specific parame-
ters described above.

5
postfix/html/postsuper.1.html
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@ -84,8 +84,9 @@ POSTSUPER(1) POSTSUPER(1)
Note: while mail is "on hold" it will not expire
when its time in the queue exceeds the <b>maxi-</b>
<b>mal_queue_lifetime</b> setting. It becomes subject to
expiration after it is released from "hold".
<b>mal_queue_lifetime</b> or <b>bounce_queue_lifetime</b> set-
ting. It becomes subject to expiration after it is
released from "hold".
<b>-H</b> <i>queue</i><b>_</b><i>id</i>
Release mail that was put "on hold". Move one mes-

54
postfix/html/qmgr.8.html
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@ -1,4 +1,4 @@
<html> <head> </head> <body> <pre>
<html> <body> <pre>
QMGR(8) QMGR(8)
<b>NAME</b>
@ -105,25 +105,25 @@ QMGR(8) QMGR(8)
actions (the message is followed by the symbolic constant
used internally by the software):
<b>D (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>SCAN</b><i>_</i><b>DEFERRED)</b>
<b>D (QMGR_REQ_SCAN_DEFERRED)</b>
Start a deferred queue scan. If a deferred queue
scan is already in progress, that scan will be
restarted as soon as it finishes.
<b>I (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>SCAN</b><i>_</i><b>INCOMING)</b>
<b>I (QMGR_REQ_SCAN_INCOMING)</b>
Start an incoming queue scan. If an incoming queue
scan is already in progress, that scan will be
restarted as soon as it finishes.
<b>A (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>SCAN</b><i>_</i><b>ALL)</b>
<b>A (QMGR_REQ_SCAN_ALL)</b>
Ignore deferred queue file time stamps. The request
affects the next deferred queue scan.
<b>F (QMGR</b><i>_</i><b>REQ</b><i>_</i><b>FLUSH</b><i>_</i><b>DEAD)</b>
<b>F (QMGR_REQ_FLUSH_DEAD)</b>
Purge all information about dead transports and
destinations.
<b>W (TRIGGER</b><i>_</i><b>REQ</b><i>_</i><b>WAKEUP)</b>
<b>W (TRIGGER_REQ_WAKEUP)</b>
Wakeup call, This is used by the master server to
instantiate servers that should not go away for-
ever. The action is to start an incoming queue
@ -152,7 +152,7 @@ QMGR(8) QMGR(8)
Corrupted message files are saved to the <b>corrupt</b> queue for
further inspection.
Depending on the setting of the <b>notify</b><i>_</i><b>classes</b> parameter,
Depending on the setting of the <b>notify_classes</b> parameter,
the postmaster is notified of bounces and of other trou-
ble.
@ -169,30 +169,30 @@ QMGR(8) QMGR(8)
command after a configuration change.
<b>Miscellaneous</b>
<b>allow</b><i>_</i><b>min</b><i>_</i><b>user</b>
<b>allow_min_user</b>
Do not bounce recipient addresses that begin with
'-'.
<b>queue</b><i>_</i><b>directory</b>
<b>queue_directory</b>
Top-level directory of the Postfix queue.
<b>Active queue controls</b>
<b>qmgr</b><i>_</i><b>clog</b><i>_</i><b>warn</b><i>_</i><b>time</b>
<b>qmgr_clog_warn_time</b>
Minimal delay between warnings that a specific des-
tination is clogging up the active queue. Specify 0
to disable.
<b>qmgr</b><i>_</i><b>message</b><i>_</i><b>active</b><i>_</i><b>limit</b>
<b>qmgr_message_active_limit</b>
Limit the number of messages in the active queue.
<b>qmgr</b><i>_</i><b>message</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<b>qmgr_message_recipient_limit</b>
Limit the number of in-memory recipients.
This parameter also limits the size of the short-
term, in-memory destination cache.
<b>Timing controls</b>
<b>minimal</b><i>_</i><b>backoff</b><i>_</i><b>time</b>
<b>minimal_backoff_time</b>
Minimal time in seconds between delivery attempts
of a deferred message.
@ -200,19 +200,23 @@ QMGR(8) QMGR(8)
destination is kept in the short-term, in-memory
destination status cache.
<b>maximal</b><i>_</i><b>backoff</b><i>_</i><b>time</b>
<b>maximal_backoff_time</b>
Maximal time in seconds between delivery attempts
of a deferred message.
<b>maximal</b><i>_</i><b>queue</b><i>_</i><b>lifetime</b>
Maximal time in days a message is queued before it
is sent back as undeliverable.
<b>maximal_queue_lifetime</b>
Maximal time (default: in days) a regular message
is queued before it is considered undeliverable.
<b>queue</b><i>_</i><b>run</b><i>_</i><b>delay</b>
<b>bounce_queue_lifetime</b>
Maximal time (default: in days) a bounce message is
queued before it is considered undeliverable.
<b>queue_run_delay</b>
Time in seconds between deferred queue scans. Queue
scans do not overlap.
<b>transport</b><i>_</i><b>retry</b><i>_</i><b>time</b>
<b>transport_retry_time</b>
Time in seconds between attempts to contact a bro-
ken delivery transport.
@ -220,7 +224,7 @@ QMGR(8) QMGR(8)
In the text below, <i>transport</i> is the first field in a <b>mas-</b>
<b>ter.cf</b> entry.
<b>qmgr</b><i>_</i><b>fudge</b><i>_</i><b>factor</b> (valid range: 10..100)
<b>qmgr_fudge_factor</b> (valid range: 10..100)
The percentage of delivery resources that a busy
mail system will use up for delivery of a large
mailing list message. With 100%, delivery of one
@ -236,25 +240,25 @@ QMGR(8) QMGR(8)
list receive that same burst of messages a whole
day later.
<b>initial</b><i>_</i><b>destination</b><i>_</i><b>concurrency</b>
<b>initial_destination_concurrency</b>
Initial per-destination concurrency level for par-
allel delivery to the same destination.
<b>default</b><i>_</i><b>destination</b><i>_</i><b>concurrency</b><i>_</i><b>limit</b>
<b>default_destination_concurrency_limit</b>
Default limit on the number of parallel deliveries
to the same destination.
<i>transport_</i><b>destination</b><i>_</i><b>concurrency</b><i>_</i><b>limit</b>
<i>transport</i><b>_destination_concurrency_limit</b>
Limit on the number of parallel deliveries to the
same destination, for delivery via the named mes-
sage <i>transport</i>.
<b>Recipient controls</b>
<b>default</b><i>_</i><b>destination</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<b>default_destination_recipient_limit</b>
Default limit on the number of recipients per mes-
sage transfer.
<i>transport_</i><b>destination</b><i>_</i><b>recipient</b><i>_</i><b>limit</b>
<i>transport</i><b>_destination_recipient_limit</b>
Limit on the number of recipients per message
transfer, for the named message <i>transport</i>.

7
postfix/html/rate.html
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@ -307,6 +307,13 @@ immediately after the first unsuccessful delivery attempt.
<p>
<dt> <b>bounce_queue_lifetime</b> (default: 2 days) <dd> How
long a bounce message stays in the queue before it is considered
undeliverable. Specify 0 for mail that should be returned
immediately after the first unsuccessful delivery attempt.
<p>
<dt> <b>minimal_backoff_time</b> (default: 1000 seconds) <dd> The
minimal amount of time a message won't be looked at, and the minimal
amount of time to stay away from a "dead" destination.

22
postfix/html/smtpd.8.html
View File

@ -80,9 +80,9 @@ SMTPD(8) SMTPD(8)
checking and without any state change. This list
overrides built-in command definitions.
<b>Content inspection controls</b>
Optionally, Postfix can be configured to send new mail to
external content filter software AFTER the mail is queued.
<b>Content inspection after mail is queued</b>
Postfix can be configured to send new mail to an external
content filter AFTER the mail is queued.
<b>content_filter</b>
The name of a mail delivery transport that filters
@ -114,22 +114,22 @@ SMTPD(8) SMTPD(8)
cally specified with the SMTP server <b>after</b>
an external content filter.
<b>Pass-through proxy</b>
Optionally, the Postfix SMTP server can be configured to
forward all mail to a proxy server, for example a real-
time content filter, BEFORE mail is queued.
<b>Content inspection before mail is queued</b>
The Postfix SMTP server can be configured to forward all
mail to a real-time SMTP-based content filter BEFORE mail
is queued.
<b>smtpd_proxy_filter</b>
The <i>host:port</i> of the SMTP proxy server. The <i>host</i> or
<i>host:</i> portion is optional.
The <i>host:port</i> of the real-time SMTP-based content
filter. The <i>host</i> or <i>host:</i> portion is optional.
<b>smtpd_proxy_timeout</b>
Timeout for connecting to, sending to and receiving
from the SMTP proxy server.
from the real-time SMTP-based content filter.
<b>smtpd_proxy_ehlo</b>
The hostname to use when sending an EHLO command to
the SMTP proxy server.
the real-time SMTP-based content filter.
<b>Authentication controls</b>
<b>smtpd_sasl_auth_enable</b>

4
postfix/man/man1/postsuper.1
View File

@ -89,8 +89,8 @@ case.
.sp
Note: while mail is "on hold" it will not expire when its
time in the queue exceeds the \fBmaximal_queue_lifetime\fR
setting. It becomes subject to expiration after it is
released from "hold".
or \fBbounce_queue_lifetime\fR setting. It becomes subject to
expiration after it is released from "hold".
.IP "\fB-H \fIqueue_id\fR"
Release mail that was put "on hold".
Move one message with the named queue ID from the named

7
postfix/man/man8/nqmgr.8
View File

@ -217,8 +217,11 @@ is kept in the short-term, in-memory destination status cache.
Maximal time in seconds between delivery attempts
of a deferred message.
.IP \fBmaximal_queue_lifetime\fR
Maximal time in days a message is queued
before it is sent back as undeliverable.
Maximal time (default: in days) a regular message is queued
before it is considered undeliverable.
.IP \fBbounce_queue_lifetime\fR
Maximal time (default: in days) a bounce message is queued
before it is considered undeliverable.
.IP \fBqueue_run_delay\fR
Time in seconds between deferred queue scans. Queue scans do
not overlap.

7
postfix/man/man8/qmgr.8
View File

@ -198,8 +198,11 @@ is kept in the short-term, in-memory destination status cache.
Maximal time in seconds between delivery attempts
of a deferred message.
.IP \fBmaximal_queue_lifetime\fR
Maximal time in days a message is queued
before it is sent back as undeliverable.
Maximal time (default: in days) a regular message is queued
before it is considered undeliverable.
.IP \fBbounce_queue_lifetime\fR
Maximal time (default: in days) a bounce message is queued
before it is considered undeliverable.
.IP \fBqueue_run_delay\fR
Time in seconds between deferred queue scans. Queue scans do
not overlap.

24
postfix/man/man8/smtpd.8
View File

@ -85,9 +85,11 @@ offered by an SMTP server.
List of commands that are treated as NOOP (no operation) commands,
without any parameter syntax checking and without any state change.
This list overrides built-in command definitions.
.SH "Content inspection controls"
Optionally, Postfix can be configured to send new mail to
external content filter software AFTER the mail is queued.
.SH "Content inspection after mail is queued"
.ad
.fi
Postfix can be configured to send new mail to an external
content filter AFTER the mail is queued.
.IP \fBcontent_filter\fR
The name of a mail delivery transport that filters mail and that
either bounces mail or re-injects the result back into Postfix.
@ -110,22 +112,20 @@ content filter.
Disable header/body_checks. This is typically specified with the
SMTP server \fBafter\fR an external content filter.
.RE
.SH "Pass-through proxy"
.SH "Content inspection before mail is queued"
.ad
.fi
.ad
Optionally, the Postfix SMTP server can be configured to
forward all mail to a proxy server, for example a real-time
content filter, BEFORE mail is queued.
The Postfix SMTP server can be configured to forward all mail
to a real-time SMTP-based content filter BEFORE mail is queued.
.IP \fBsmtpd_proxy_filter\fR
The \fIhost:port\fR of the SMTP proxy server. The \fIhost\fR
or \fIhost:\fR portion is optional.
The \fIhost:port\fR of the real-time SMTP-based content filter.
The \fIhost\fR or \fIhost:\fR portion is optional.
.IP \fBsmtpd_proxy_timeout\fR
Timeout for connecting to, sending to and receiving from
the SMTP proxy server.
the real-time SMTP-based content filter.
.IP \fBsmtpd_proxy_ehlo\fR
The hostname to use when sending an EHLO command to the
SMTP proxy server.
real-time SMTP-based content filter.
.SH "Authentication controls"
.IP \fBsmtpd_sasl_auth_enable\fR
Enable per-session authentication as per RFC 2554 (SASL).

6
postfix/src/global/mail_params.h
View File

@ -548,6 +548,10 @@ extern int var_max_backoff_time;
#define DEF_MAX_QUEUE_TIME "5d"
extern int var_max_queue_time;
#define VAR_DSN_QUEUE_TIME "bounce_queue_lifetime"
#define DEF_DSN_QUEUE_TIME "$" VAR_MAX_QUEUE_TIME
extern int var_dsn_queue_time;
#define VAR_DELAY_WARN_TIME "delay_warning_time"
#define DEF_DELAY_WARN_TIME "0h"
extern int var_delay_warn_time;
@ -1760,7 +1764,7 @@ extern int var_verify_pos_try;
extern int var_verify_neg_exp;
#define VAR_VERIFY_NEG_TRY "address_verify_negative_refresh_time"
#define DEF_VERIFY_NEG_TRY "2h"
#define DEF_VERIFY_NEG_TRY "3h"
extern int var_verify_neg_try;
#define VAR_VERIFY_NEG_CACHE "address_verify_negative_cache"

2
postfix/src/global/mail_version.h
View File

@ -20,7 +20,7 @@
* Patches change the patchlevel and the release date. Snapshots change the
* release date only, unless they include the same bugfix as a patch release.
*/
#define MAIL_RELEASE_DATE "20031224"
#define MAIL_RELEASE_DATE "20031226"
#define VAR_MAIL_VERSION "mail_version"
#define DEF_MAIL_VERSION "2.0.16-" MAIL_RELEASE_DATE

28
postfix/src/global/resolve_clnt.c
View File

@ -166,15 +166,26 @@ void resolve_clnt(const char *class, const char *addr, RESOLVE_REPLY *reply)
/*
* Peek at the cache.
*/
#define IFSET(flag, text) ((reply->flags & (flag)) ? (text) : "")
if (*addr && strcmp(addr, STR(last_addr)) == 0) {
vstring_strcpy(reply->transport, STR(last_reply.transport));
vstring_strcpy(reply->nexthop, STR(last_reply.nexthop));
vstring_strcpy(reply->recipient, STR(last_reply.recipient));
reply->flags = last_reply.flags;
if (msg_verbose)
msg_info("%s: cached: `%s' -> t=`%s' h=`%s' r=`%s'",
msg_info("%s: cached: `%s' -> transp=`%s' host=`%s' rcpt=`%s' flags=%s%s%s%s class=%s%s%s%s%s",
myname, addr, STR(reply->transport),
STR(reply->nexthop), STR(reply->recipient));
STR(reply->nexthop), STR(reply->recipient),
IFSET(RESOLVE_FLAG_FINAL, "final"),
IFSET(RESOLVE_FLAG_ROUTED, "routed"),
IFSET(RESOLVE_FLAG_ERROR, "error"),
IFSET(RESOLVE_FLAG_FAIL, "fail"),
IFSET(RESOLVE_CLASS_LOCAL, "local"),
IFSET(RESOLVE_CLASS_ALIAS, "alias"),
IFSET(RESOLVE_CLASS_VIRTUAL, "virtual"),
IFSET(RESOLVE_CLASS_RELAY, "relay"),
IFSET(RESOLVE_CLASS_DEFAULT, "default"));
return;
}
@ -208,9 +219,18 @@ void resolve_clnt(const char *class, const char *addr, RESOLVE_REPLY *reply)
var_rewrite_service);
} else {
if (msg_verbose)
msg_info("%s: `%s' -> t=`%s' h=`%s' r=`%s'",
msg_info("%s: `%s' -> transp=`%s' host=`%s' rcpt=`%s' flags=%s%s%s%s class=%s%s%s%s%s",
myname, addr, STR(reply->transport),
STR(reply->nexthop), STR(reply->recipient));
STR(reply->nexthop), STR(reply->recipient),
IFSET(RESOLVE_FLAG_FINAL, "final"),
IFSET(RESOLVE_FLAG_ROUTED, "routed"),
IFSET(RESOLVE_FLAG_ERROR, "error"),
IFSET(RESOLVE_FLAG_FAIL, "fail"),
IFSET(RESOLVE_CLASS_LOCAL, "local"),
IFSET(RESOLVE_CLASS_ALIAS, "alias"),
IFSET(RESOLVE_CLASS_VIRTUAL, "virtual"),
IFSET(RESOLVE_CLASS_RELAY, "relay"),
IFSET(RESOLVE_CLASS_DEFAULT, "default"));
if (STR(reply->transport)[0] == 0)
msg_warn("%s: null transport result for: <%s>", myname, addr);
else if (STR(reply->recipient)[0] == 0 && *addr != 0)

2
postfix/src/master/Makefile.in
View File

@ -1,6 +1,6 @@
SHELL = /bin/sh
SRCS = master.c master_conf.c master_ent.c master_sig.c master_avail.c \
master_spawn.c master_service.c master_status.o master_listen.c \
master_spawn.c master_service.c master_status.c master_listen.c \
master_proto.c single_server.c multi_server.c master_vars.c \
master_wakeup.c master_flow.c mail_flow.c
OBJS = master.o master_conf.o master_ent.o master_sig.o master_avail.o \

4
postfix/src/master/master.h
View File

@ -106,10 +106,6 @@ extern void master_refresh(void);
/*
* master_vars.c
*/
extern char *var_program_dir;
extern int var_proc_limit;
extern int var_use_limit;
extern int var_idle_limit;
extern void master_vars_init(void);
/*

9
postfix/src/nqmgr/qmgr.c
View File

@ -193,8 +193,11 @@
/* Maximal time in seconds between delivery attempts
/* of a deferred message.
/* .IP \fBmaximal_queue_lifetime\fR
/* Maximal time in days a message is queued
/* before it is sent back as undeliverable.
/* Maximal time (default: in days) a regular message is queued
/* before it is considered undeliverable.
/* .IP \fBbounce_queue_lifetime\fR
/* Maximal time (default: in days) a bounce message is queued
/* before it is considered undeliverable.
/* .IP \fBqueue_run_delay\fR
/* Time in seconds between deferred queue scans. Queue scans do
/* not overlap.
@ -314,6 +317,7 @@ int var_queue_run_delay;
int var_min_backoff_time;
int var_max_backoff_time;
int var_max_queue_time;
int var_dsn_queue_time;
int var_qmgr_active_limit;
int var_qmgr_rcpt_limit;
int var_qmgr_msg_rcpt_limit;
@ -529,6 +533,7 @@ int main(int argc, char **argv)
VAR_MIN_BACKOFF_TIME, DEF_MIN_BACKOFF_TIME, &var_min_backoff_time, 1, 0,
VAR_MAX_BACKOFF_TIME, DEF_MAX_BACKOFF_TIME, &var_max_backoff_time, 1, 0,
VAR_MAX_QUEUE_TIME, DEF_MAX_QUEUE_TIME, &var_max_queue_time, 0, 8640000,
VAR_DSN_QUEUE_TIME, DEF_DSN_QUEUE_TIME, &var_dsn_queue_time, 0, 8640000,
VAR_XPORT_RETRY_TIME, DEF_XPORT_RETRY_TIME, &var_transport_retry_time, 1, 0,
VAR_QMGR_CLOG_WARN_TIME, DEF_QMGR_CLOG_WARN_TIME, &var_qmgr_clog_warn_time, 0, 0,
0,

3
postfix/src/nqmgr/qmgr_active.c
View File

@ -378,7 +378,8 @@ static void qmgr_active_done_2_generic(QMGR_MESSAGE *message)
* daemon waits for the qmgr to accept the "new mail" trigger.
*/
if (message->flags) {
if (event_time() >= message->arrival_time + var_max_queue_time) {
if (event_time() >= message->arrival_time +
(*message->sender ? var_max_queue_time : var_dsn_queue_time)) {
msg_info("%s: from=<%s>, status=expired, returned to sender",
message->queue_id, message->sender);
if (message->verp_delims == 0 || var_verp_bounce_off)

4
postfix/src/postsuper/postsuper.c
View File

@ -83,8 +83,8 @@
/* .sp
/* Note: while mail is "on hold" it will not expire when its
/* time in the queue exceeds the \fBmaximal_queue_lifetime\fR
/* setting. It becomes subject to expiration after it is
/* released from "hold".
/* or \fBbounce_queue_lifetime\fR setting. It becomes subject to
/* expiration after it is released from "hold".
/* .IP "\fB-H \fIqueue_id\fR"
/* Release mail that was put "on hold".
/* Move one message with the named queue ID from the named

9
postfix/src/qmgr/qmgr.c
View File

@ -174,8 +174,11 @@
/* Maximal time in seconds between delivery attempts
/* of a deferred message.
/* .IP \fBmaximal_queue_lifetime\fR
/* Maximal time in days a message is queued
/* before it is sent back as undeliverable.
/* Maximal time (default: in days) a regular message is queued
/* before it is considered undeliverable.
/* .IP \fBbounce_queue_lifetime\fR
/* Maximal time (default: in days) a bounce message is queued
/* before it is considered undeliverable.
/* .IP \fBqueue_run_delay\fR
/* Time in seconds between deferred queue scans. Queue scans do
/* not overlap.
@ -269,6 +272,7 @@ int var_queue_run_delay;
int var_min_backoff_time;
int var_max_backoff_time;
int var_max_queue_time;
int var_dsn_queue_time;
int var_qmgr_active_limit;
int var_qmgr_rcpt_limit;
int var_init_dest_concurrency;
@ -481,6 +485,7 @@ int main(int argc, char **argv)
VAR_MIN_BACKOFF_TIME, DEF_MIN_BACKOFF_TIME, &var_min_backoff_time, 1, 0,
VAR_MAX_BACKOFF_TIME, DEF_MAX_BACKOFF_TIME, &var_max_backoff_time, 1, 0,
VAR_MAX_QUEUE_TIME, DEF_MAX_QUEUE_TIME, &var_max_queue_time, 0, 8640000,
VAR_DSN_QUEUE_TIME, DEF_DSN_QUEUE_TIME, &var_dsn_queue_time, 0, 8640000,
VAR_XPORT_RETRY_TIME, DEF_XPORT_RETRY_TIME, &var_transport_retry_time, 1, 0,
VAR_QMGR_CLOG_WARN_TIME, DEF_QMGR_CLOG_WARN_TIME, &var_qmgr_clog_warn_time, 0, 0,
0,

3
postfix/src/qmgr/qmgr_active.c
View File

@ -378,7 +378,8 @@ static void qmgr_active_done_2_generic(QMGR_MESSAGE *message)
* daemon waits for the qmgr to accept the "new mail" trigger.
*/
if (message->flags) {
if (event_time() >= message->arrival_time + var_max_queue_time) {
if (event_time() >= message->arrival_time +
(*message->sender ? var_max_queue_time : var_dsn_queue_time)) {
msg_info("%s: from=<%s>, status=expired, returned to sender",
message->queue_id, message->sender);
if (message->verp_delims == 0 || var_verp_bounce_off)

6
postfix/src/smtp/smtp.c
View File

@ -419,8 +419,8 @@ static void smtp_service(VSTREAM *client_stream, char *unused_service, char **ar
static void pre_init(char *unused_name, char **unused_argv)
{
static NAME_MASK lookup_masks[] = {
SMTP_HOST_LOOKUP_DNS, SMTP_MASK_DNS,
SMTP_HOST_LOOKUP_NATIVE, SMTP_MASK_NATIVE,
SMTP_HOST_LOOKUP_DNS, SMTP_HOST_FLAG_DNS,
SMTP_HOST_LOOKUP_NATIVE, SMTP_HOST_FLAG_NATIVE,
0,
};
@ -433,7 +433,7 @@ static void pre_init(char *unused_name, char **unused_argv)
* Select hostname lookup mechanisms.
*/
if (var_disable_dns)
smtp_host_lookup_mask = SMTP_MASK_NATIVE;
smtp_host_lookup_mask = SMTP_HOST_FLAG_NATIVE;
else
smtp_host_lookup_mask = name_mask(VAR_SMTP_HOST_LOOKUP, lookup_masks,
var_smtp_host_lookup);

21
postfix/src/smtp/smtp.h
View File

@ -82,20 +82,27 @@ typedef struct SMTP_STATE {
#define SMTP_FEATURE_XFORWARD_PROTO (1<<9)
#define SMTP_FEATURE_XFORWARD_HELO (1<<10)
/*
* Misc flags.
*/
#define SMTP_MISC_FLAG_LOOP_DETECT (1<<0)
#define SMTP_MISC_FLAG_DEFAULT SMTP_MISC_FLAG_LOOP_DETECT
/*
* smtp.c
*/
extern int smtp_errno; /* XXX can we get rid of this? */
#define SMTP_NONE 0 /* no error */
#define SMTP_FAIL 1 /* permanent error */
#define SMTP_RETRY 2 /* temporary error */
#define SMTP_LOOP 3 /* MX loop */
#define SMTP_ERR_NONE 0 /* no error */
#define SMTP_ERR_FAIL 1 /* permanent error */
#define SMTP_ERR_RETRY 2 /* temporary error */
#define SMTP_ERR_LOOP 3 /* mailer loop */
extern int smtp_host_lookup_mask; /* host lookup methods to use */
#define SMTP_MASK_DNS (1<<0)
#define SMTP_MASK_NATIVE (1<<1)
#define SMTP_HOST_FLAG_DNS (1<<0)
#define SMTP_HOST_FLAG_NATIVE (1<<1)
/*
* smtp_session.c
@ -119,7 +126,7 @@ extern int smtp_connect(SMTP_STATE *);
/*
* smtp_proto.c
*/
extern int smtp_helo(SMTP_STATE *);
extern int smtp_helo(SMTP_STATE *, int);
extern int smtp_xfer(SMTP_STATE *);
extern void smtp_quit(SMTP_STATE *);

64
postfix/src/smtp/smtp_addr.c
View File

@ -6,12 +6,14 @@
/* SYNOPSIS
/* #include "smtp_addr.h"
/*
/* DNS_RR *smtp_domain_addr(name, why)
/* DNS_RR *smtp_domain_addr(name, misc_flags, why)
/* char *name;
/* int misc_flags;
/* VSTRING *why;
/*
/* DNS_RR *smtp_host_addr(name, why)
/* DNS_RR *smtp_host_addr(name, misc_flags, why)
/* char *name;
/* int misc_flags;
/* VSTRING *why;
/* DESCRIPTION
/* This module implements Internet address lookups. By default,
@ -173,7 +175,7 @@ static DNS_RR *smtp_addr_one(DNS_RR *addr_list, char *host, unsigned pref, VSTRI
/*
* Use DNS lookup, but keep the option open to use native name service.
*/
if (smtp_host_lookup_mask & SMTP_MASK_DNS) {
if (smtp_host_lookup_mask & SMTP_HOST_FLAG_DNS) {
switch (dns_lookup(host, T_A, RES_DEFNAMES, &addr, (VSTRING *) 0, why)) {
case DNS_OK:
for (rr = addr; rr; rr = rr->next)
@ -181,15 +183,15 @@ static DNS_RR *smtp_addr_one(DNS_RR *addr_list, char *host, unsigned pref, VSTRI
addr_list = dns_rr_append(addr_list, addr);
return (addr_list);
default:
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
return (addr_list);
case DNS_FAIL:
if (smtp_errno != SMTP_RETRY)
smtp_errno = SMTP_FAIL;
if (smtp_errno != SMTP_ERR_RETRY)
smtp_errno = SMTP_ERR_FAIL;
return (addr_list);
case DNS_NOTFOUND:
if (smtp_errno != SMTP_RETRY)
smtp_errno = SMTP_FAIL;
if (smtp_errno != SMTP_ERR_RETRY)
smtp_errno = SMTP_ERR_FAIL;
/* maybe gethostbyname() will succeed */
break;
}
@ -198,18 +200,19 @@ static DNS_RR *smtp_addr_one(DNS_RR *addr_list, char *host, unsigned pref, VSTRI
/*
* Use the native name service which also looks in /etc/hosts.
*/
if (smtp_host_lookup_mask & SMTP_MASK_NATIVE) {
if (smtp_host_lookup_mask & SMTP_HOST_FLAG_NATIVE) {
memset((char *) &fixed, 0, sizeof(fixed));
if ((hp = gethostbyname(host)) == 0) {
vstring_sprintf(why, "%s: %s", host, HSTRERROR(h_errno));
if (smtp_errno != SMTP_RETRY)
smtp_errno = (h_errno == TRY_AGAIN ? SMTP_RETRY : SMTP_FAIL);
if (smtp_errno != SMTP_ERR_RETRY)
smtp_errno =
(h_errno == TRY_AGAIN ? SMTP_ERR_RETRY : SMTP_ERR_FAIL);
} else if (hp->h_addrtype != AF_INET) {
vstring_sprintf(why, "%s: host not found", host);
msg_warn("%s: unknown address family %d for %s",
myname, hp->h_addrtype, host);
if (smtp_errno != SMTP_RETRY)
smtp_errno = SMTP_FAIL;
if (smtp_errno != SMTP_ERR_RETRY)
smtp_errno = SMTP_ERR_FAIL;
} else {
while (hp->h_addr_list[0]) {
addr_list = dns_rr_append(addr_list,
@ -331,7 +334,7 @@ static int smtp_compare_pref(DNS_RR *a, DNS_RR *b)
/* smtp_domain_addr - mail exchanger address lookup */
DNS_RR *smtp_domain_addr(char *name, VSTRING *why)
DNS_RR *smtp_domain_addr(char *name, int misc_flags, VSTRING *why)
{
DNS_RR *mx_names;
DNS_RR *addr_list = 0;
@ -339,7 +342,7 @@ DNS_RR *smtp_domain_addr(char *name, VSTRING *why)
unsigned best_pref;
unsigned best_found;
smtp_errno = SMTP_NONE; /* Paranoia */
smtp_errno = SMTP_ERR_NONE; /* Paranoia */
/*
* Preferences from DNS use 0..32767, fall-backs use 32768+.
@ -396,14 +399,14 @@ DNS_RR *smtp_domain_addr(char *name, VSTRING *why)
*/
switch (dns_lookup(name, T_MX, 0, &mx_names, (VSTRING *) 0, why)) {
default:
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
if (var_ign_mx_lookup_err)
addr_list = smtp_host_addr(name, why);
addr_list = smtp_host_addr(name, misc_flags, why);
break;
case DNS_FAIL:
smtp_errno = SMTP_FAIL;
smtp_errno = SMTP_ERR_FAIL;
if (var_ign_mx_lookup_err)
addr_list = smtp_host_addr(name, why);
addr_list = smtp_host_addr(name, misc_flags, why);
break;
case DNS_OK:
mx_names = dns_rr_sort(mx_names, smtp_compare_pref);
@ -412,24 +415,25 @@ DNS_RR *smtp_domain_addr(char *name, VSTRING *why)
dns_rr_free(mx_names);
if (addr_list == 0) {
if (var_smtp_defer_mxaddr)
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
msg_warn("no MX host for %s has a valid A record", name);
break;
}
best_found = (addr_list ? addr_list->pref : IMPOSSIBLE_PREFERENCE);
if (msg_verbose)
smtp_print_addr(name, addr_list);
if ((self = smtp_find_self(addr_list)) != 0) {
if ((misc_flags & SMTP_MISC_FLAG_LOOP_DETECT)
&& (self = smtp_find_self(addr_list)) != 0) {
addr_list = smtp_truncate_self(addr_list, self->pref);
if (addr_list == 0) {
if (best_pref != best_found) {
vstring_sprintf(why, "unable to find primary relay for %s",
name);
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
} else {
vstring_sprintf(why, "mail for %s loops back to myself",
name);
smtp_errno = SMTP_LOOP;
smtp_errno = SMTP_ERR_LOOP;
}
}
}
@ -439,7 +443,7 @@ DNS_RR *smtp_domain_addr(char *name, VSTRING *why)
}
break;
case DNS_NOTFOUND:
addr_list = smtp_host_addr(name, why);
addr_list = smtp_host_addr(name, misc_flags, why);
break;
}
@ -451,11 +455,11 @@ DNS_RR *smtp_domain_addr(char *name, VSTRING *why)
/* smtp_host_addr - direct host lookup */
DNS_RR *smtp_host_addr(char *host, VSTRING *why)
DNS_RR *smtp_host_addr(char *host, int misc_flags, VSTRING *why)
{
DNS_RR *addr_list;
smtp_errno = SMTP_NONE; /* Paranoia */
smtp_errno = SMTP_ERR_NONE; /* Paranoia */
/*
* If the host is specified by numerical address, just convert the
@ -463,14 +467,14 @@ DNS_RR *smtp_host_addr(char *host, VSTRING *why)
*/
#define PREF0 0
addr_list = smtp_addr_one((DNS_RR *) 0, host, PREF0, why);
#if 0
if (addr_list && smtp_find_self(addr_list) != 0) {
if (addr_list
&& (misc_flags & SMTP_MISC_FLAG_LOOP_DETECT)
&& smtp_find_self(addr_list) != 0) {
dns_rr_free(addr_list);
vstring_sprintf(why, "mail for %s loops back to myself", host);
smtp_errno = SMTP_LOOP;
smtp_errno = SMTP_ERR_LOOP;
return (0);
}
#endif
if (addr_list && addr_list->next && var_smtp_rand_addr)
addr_list = dns_rr_shuffle(addr_list);
if (msg_verbose)

4
postfix/src/smtp/smtp_addr.h
View File

@ -16,8 +16,8 @@
/*
* Internal interfaces.
*/
extern DNS_RR *smtp_host_addr(char *, VSTRING *);
extern DNS_RR *smtp_domain_addr(char *, VSTRING *);
extern DNS_RR *smtp_host_addr(char *, int, VSTRING *);
extern DNS_RR *smtp_domain_addr(char *, int, VSTRING *);
/* LICENSE
/* .ad

59
postfix/src/smtp/smtp_connect.c
View File

@ -9,8 +9,8 @@
/* int smtp_connect(state)
/* SMTP_STATE *state;
/* DESCRIPTION
/* This module implements SMTP connection management and mail
/* delivery.
/* This module implements SMTP connection management and controls
/* mail delivery.
/*
/* smtp_connect() attempts to establish an SMTP session with a host
/* that represents the destination domain, or with an optional fallback
@ -62,7 +62,7 @@
#endif
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffff
#define INADDR_NONE 0xffffffff
#endif
/* Utility library. */
@ -111,14 +111,14 @@ static SMTP_SESSION *smtp_connect_addr(DNS_RR *addr, unsigned port,
int ch;
unsigned long inaddr;
smtp_errno = SMTP_NONE; /* Paranoia */
smtp_errno = SMTP_ERR_NONE; /* Paranoia */
/*
* Sanity checks.
*/
if (addr->data_len > sizeof(sin.sin_addr)) {
msg_warn("%s: skip address with length %d", myname, addr->data_len);
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
return (0);
}
@ -184,7 +184,7 @@ static SMTP_SESSION *smtp_connect_addr(DNS_RR *addr, unsigned port,
if (conn_stat < 0) {
vstring_sprintf(why, "connect to %s[%s]: %m",
addr->name, inet_ntoa(sin.sin_addr));
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
close(sock);
return (0);
}
@ -195,7 +195,7 @@ static SMTP_SESSION *smtp_connect_addr(DNS_RR *addr, unsigned port,
if (read_wait(sock, var_smtp_helo_tmout) < 0) {
vstring_sprintf(why, "connect to %s[%s]: read timeout",
addr->name, inet_ntoa(sin.sin_addr));
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
close(sock);
return (0);
}
@ -207,7 +207,7 @@ static SMTP_SESSION *smtp_connect_addr(DNS_RR *addr, unsigned port,
if ((ch = VSTREAM_GETC(stream)) == VSTREAM_EOF) {
vstring_sprintf(why, "connect to %s[%s]: server dropped connection without sending the initial SMTP greeting",
addr->name, inet_ntoa(sin.sin_addr));
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
vstream_fclose(stream);
return (0);
}
@ -219,7 +219,7 @@ static SMTP_SESSION *smtp_connect_addr(DNS_RR *addr, unsigned port,
if (ch == '4' && var_smtp_skip_4xx_greeting) {
vstring_sprintf(why, "connect to %s[%s]: server refused mail service",
addr->name, inet_ntoa(sin.sin_addr));
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
vstream_fclose(stream);
return (0);
}
@ -230,7 +230,7 @@ static SMTP_SESSION *smtp_connect_addr(DNS_RR *addr, unsigned port,
if (ch == '5' && var_smtp_skip_5xx_greeting) {
vstring_sprintf(why, "connect to %s[%s]: server refused mail service",
addr->name, inet_ntoa(sin.sin_addr));
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
vstream_fclose(stream);
return (0);
}
@ -290,6 +290,7 @@ int smtp_connect(SMTP_STATE *state)
DNS_RR *next;
int addr_count;
int sess_count;
int misc_flags = SMTP_MISC_FLAG_DEFAULT;
/*
* First try to deliver to the indicated destination, then try to deliver
@ -336,10 +337,14 @@ int smtp_connect(SMTP_STATE *state)
*/
if (msg_verbose)
msg_info("connecting to %s port %d", host, ntohs(port));
if (ntohs(port) != 25)
misc_flags &= ~SMTP_MISC_FLAG_LOOP_DETECT;
else
misc_flags |= SMTP_MISC_FLAG_LOOP_DETECT;
if (var_disable_dns || *dest == '[') {
addr_list = smtp_host_addr(host, why);
addr_list = smtp_host_addr(host, misc_flags, why);
} else {
addr_list = smtp_domain_addr(host, why);
addr_list = smtp_domain_addr(host, misc_flags, why);
}
myfree(dest_buf);
@ -347,20 +352,18 @@ int smtp_connect(SMTP_STATE *state)
* Don't try any backup host if mail loops to myself. That would just
* make the problem worse.
*/
if (addr_list == 0 && smtp_errno == SMTP_LOOP)
if (addr_list == 0 && smtp_errno == SMTP_ERR_LOOP)
break;
/*
* Connect to an SMTP server. XXX Limit the number of addresses that
* we're willing to try for a non-fallback destination.
* Connect to an SMTP server.
*
* At the start of an SMTP session, all recipients are unmarked. In the
* course of an SMTP session, recipients are marked as KEEP (deliver
* to backup mail server) or DROP (remove from recipient list). The
* marking policy is configurable with the smtp_backup_on_soft_error
* parameter. At the end of an SMTP session, weed out the recipient
* list. Unmark any left-over recipients and try to deliver them to a
* backup mail server.
* to alternate mail server) or DROP (remove from recipient list). At
* the end of an SMTP session, weed out the recipient list. Unmark
* any left-over recipients and try to deliver them to a backup mail
* server.
*/
sess_count = addr_count = 0;
for (addr = addr_list; SMTP_RCPT_LEFT(state) > 0 && addr; addr = next) {
@ -373,7 +376,7 @@ int smtp_connect(SMTP_STATE *state)
state->final_server = (cpp[1] == 0 && next == 0);
state->session->best = (addr->pref == addr_list->pref);
debug_peer_check(state->session->host, state->session->addr);
if (smtp_helo(state) == 0)
if (smtp_helo(state, misc_flags) == 0)
smtp_xfer(state);
if (state->history != 0
&& (state->error_mask & name_mask(VAR_NOTIFY_CLASSES,
@ -404,8 +407,8 @@ int smtp_connect(SMTP_STATE *state)
default:
msg_panic("smtp_connect: bad error indication %d", smtp_errno);
case SMTP_LOOP:
case SMTP_FAIL:
case SMTP_ERR_LOOP:
case SMTP_ERR_FAIL:
/*
* The fall-back destination did not resolve as expected, or it
@ -413,7 +416,7 @@ int smtp_connect(SMTP_STATE *state)
*/
if (sites->argc > 1 && cpp > sites->argv) {
msg_warn("%s configuration problem", VAR_FALLBACK_RELAY);
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
}
/*
@ -422,14 +425,14 @@ int smtp_connect(SMTP_STATE *state)
*/
else if (strcmp(sites->argv[0], var_relayhost) == 0) {
msg_warn("%s configuration problem", VAR_RELAYHOST);
smtp_errno = SMTP_RETRY;
smtp_errno = SMTP_ERR_RETRY;
}
/*
* Mail for the next-hop destination loops back to myself. Pass
* the mail to the best_mx_transport or bounce it.
*/
else if (smtp_errno == SMTP_LOOP && *var_bestmx_transp) {
else if (smtp_errno == SMTP_ERR_LOOP && *var_bestmx_transp) {
state->status = deliver_pass_all(MAIL_CLASS_PRIVATE,
var_bestmx_transp,
request);
@ -438,14 +441,14 @@ int smtp_connect(SMTP_STATE *state)
}
/* FALLTHROUGH */
case SMTP_RETRY:
case SMTP_ERR_RETRY:
/*
* We still need to bounce or defer some left-over recipients:
* either mail loops or some backup mail server was unavailable.
*/
state->final_server = 1; /* XXX */
smtp_site_fail(state, smtp_errno == SMTP_RETRY ? 450 : 550,
smtp_site_fail(state, smtp_errno == SMTP_ERR_RETRY ? 450 : 550,
"%s", vstring_str(why));
/*

5
postfix/src/smtp/smtp_proto.c
View File

@ -167,7 +167,7 @@ char *xfer_request[SMTP_STATE_LAST] = {
/* smtp_helo - perform initial handshake with SMTP server */
int smtp_helo(SMTP_STATE *state)
int smtp_helo(SMTP_STATE *state, int misc_flags)
{
SMTP_SESSION *session = state->session;
DELIVER_REQUEST *request = state->request;
@ -218,6 +218,7 @@ int smtp_helo(SMTP_STATE *state)
(void) mystrtok(&words, "- \t\n");
for (n = 0; (word = mystrtok(&words, " \t\n")) != 0; n++) {
if (n == 0 && strcasecmp(word, var_myhostname) == 0) {
if (misc_flags & SMTP_MISC_FLAG_LOOP_DETECT)
msg_warn("host %s greeted me with my own hostname %s",
session->namaddr, var_myhostname);
} else if (strcasecmp(word, "ESMTP") == 0)
@ -283,6 +284,7 @@ int smtp_helo(SMTP_STATE *state)
smtp_sasl_helo_auth(state, words);
#endif
else if (strcasecmp(word, var_myhostname) == 0) {
if (misc_flags & SMTP_MISC_FLAG_LOOP_DETECT) {
msg_warn("host %s replied to HELO/EHLO with my own hostname %s",
session->namaddr, var_myhostname);
return (smtp_site_fail(state, session->best ? 550 : 450,
@ -291,6 +293,7 @@ int smtp_helo(SMTP_STATE *state)
}
}
}
}
if (msg_verbose)
msg_info("server features: 0x%x size %.0f",
state->features, (double) state->size_limit);

2
postfix/src/smtp/smtp_rcpt.c
View File

@ -36,7 +36,7 @@
/* .IP \(bu
/* In the course of a delivery attempt each recipient is
/* marked either as DROP (remove from recipient list) or KEEP
/* (deliver to backup mail server).
/* (deliver to alternate mail server).
/* .IP \(bu
/* After a delivery attempt any recipients marked DROP are deleted
/* from the request, and the left-over recipients are unmarked.

44
postfix/src/smtpd/smtpd.c
View File

@ -71,9 +71,11 @@
/* List of commands that are treated as NOOP (no operation) commands,
/* without any parameter syntax checking and without any state change.
/* This list overrides built-in command definitions.
/* .SH "Content inspection controls"
/* Optionally, Postfix can be configured to send new mail to
/* external content filter software AFTER the mail is queued.
/* .SH "Content inspection after mail is queued"
/* .ad
/* .fi
/* Postfix can be configured to send new mail to an external
/* content filter AFTER the mail is queued.
/* .IP \fBcontent_filter\fR
/* The name of a mail delivery transport that filters mail and that
/* either bounces mail or re-injects the result back into Postfix.
@ -96,22 +98,20 @@
/* Disable header/body_checks. This is typically specified with the
/* SMTP server \fBafter\fR an external content filter.
/* .RE
/* .SH "Pass-through proxy"
/* .SH "Content inspection before mail is queued"
/* .ad
/* .fi
/* .ad
/* Optionally, the Postfix SMTP server can be configured to
/* forward all mail to a proxy server, for example a real-time
/* content filter, BEFORE mail is queued.
/* The Postfix SMTP server can be configured to forward all mail
/* to a real-time SMTP-based content filter BEFORE mail is queued.
/* .IP \fBsmtpd_proxy_filter\fR
/* The \fIhost:port\fR of the SMTP proxy server. The \fIhost\fR
/* or \fIhost:\fR portion is optional.
/* The \fIhost:port\fR of the real-time SMTP-based content filter.
/* The \fIhost\fR or \fIhost:\fR portion is optional.
/* .IP \fBsmtpd_proxy_timeout\fR
/* Timeout for connecting to, sending to and receiving from
/* the SMTP proxy server.
/* the real-time SMTP-based content filter.
/* .IP \fBsmtpd_proxy_ehlo\fR
/* The hostname to use when sending an EHLO command to the
/* SMTP proxy server.
/* real-time SMTP-based content filter.
/* .SH "Authentication controls"
/* .IP \fBsmtpd_sasl_auth_enable\fR
/* Enable per-session authentication as per RFC 2554 (SASL).
@ -966,8 +966,10 @@ static char *extract_addr(SMTPD_STATE *state, SMTPD_TOKEN *arg,
* Report trouble. Log a warning only if we are going to sleep+reject so
* that attackers can't flood our logfiles.
*/
if (err == 0)
if ((arg->strval[0] == 0 && !allow_empty_addr)
|| (strict_rfc821 && arg->strval[0] == '@')) {
|| (strict_rfc821 && arg->strval[0] == '@')
|| smtpd_check_addr(STR(arg->vstrval)) != 0) {
msg_warn("Illegal address syntax from %s in %s command: %s",
state->namaddr, state->where, STR(arg->vstrval));
err = "501 Bad address syntax";
@ -1243,6 +1245,12 @@ static int rcpt_cmd(SMTPD_STATE *state, int argc, SMTPD_TOKEN *argv)
} else if (state->cleanup == 0) {
mail_open_stream(state);
}
/*
* Proxy the recipient. OK, so we lied. If the real-time proxy rejects
* the recipient then we can have a proxy connection without having
* accepted a recipient.
*/
if (state->proxy && smtpd_proxy_cmd(state, SMTPD_PROX_WANT_OK,
"%s", STR(state->buffer)) != 0) {
smtpd_chat_reply(state, "%s", STR(state->proxy_buffer));
@ -1343,9 +1351,6 @@ static int data_cmd(SMTPD_STATE *state, int argc, SMTPD_TOKEN *unused_argv)
* Terminate the message envelope segment. Start the message content
* segment, and prepend our own Received: header. If there is only one
* recipient, list the recipient address.
*
* Suppress our own Received: header in the unlikely case that we are an
* intermediate proxy.
*/
if (state->cleanup) {
if (state->saved_filter)
@ -1356,6 +1361,11 @@ static int data_cmd(SMTPD_STATE *state, int argc, SMTPD_TOKEN *unused_argv)
rec_fprintf(state->cleanup, REC_TYPE_FLGS, "%d", state->saved_flags);
rec_fputs(state->cleanup, REC_TYPE_MESG, "");
}
/*
* Suppress our own Received: header in the unlikely case that we are an
* intermediate proxy.
*/
if (!state->proxy || state->xforward.flags == 0) {
out_fprintf(out_stream, REC_TYPE_NORM,
"Received: from %s (%s [%s])",
@ -1389,7 +1399,7 @@ static int data_cmd(SMTPD_STATE *state, int argc, SMTPD_TOKEN *unused_argv)
/*
* Copy the message content. If the cleanup process has a problem, keep
* reading until the remote stops sending, then complain. Read typed
* reading until the remote stops sending, then complain. Produce typed
* records from the SMTP stream so we can handle data that spans buffers.
*
* XXX Force an empty record when the queue file content begins with

74
postfix/src/smtpd/smtpd.h
View File

@ -56,35 +56,39 @@ typedef struct {
} SMTPD_XFORWARD_ATTR;
typedef struct SMTPD_STATE {
int err;
VSTREAM *client;
VSTRING *buffer;
time_t time;
char *name;
char *addr;
char *namaddr;
int err; /* cleanup server/queue file errors */
VSTREAM *client; /* SMTP client handle */
VSTRING *buffer; /* SMTP client buffer */
time_t time; /* start of MAIL FROM transaction */
char *name; /* client hostname */
char *addr; /* client host address string */
char *namaddr; /* combined name and address */
int peer_code; /* 2=ok, 4=soft, 5=hard */
int error_count;
int error_mask;
int notify_mask;
char *helo_name;
char *queue_id;
VSTREAM *cleanup;
MAIL_STREAM *dest;
int rcpt_count;
char *access_denied;
ARGV *history;
char *reason;
char *sender;
int error_count; /* reset after DOT */
int error_mask; /* client errors */
int notify_mask; /* what to report to postmaster */
char *helo_name; /* client HELO/EHLO argument */
char *queue_id; /* from cleanup server/queue file */
VSTREAM *cleanup; /* cleanup server/queue file handle */
MAIL_STREAM *dest; /* another server/file handle */
int rcpt_count; /* number of accepted recipients */
char *access_denied; /* fixme */
ARGV *history; /* protocol transcript */
char *reason; /* cause of connection loss */
char *sender; /* sender address */
char *encoding; /* owned by mail_cmd() */
char *verp_delims; /* owned by mail_cmd() */
char *recipient;
char *etrn_name;
char *protocol;
char *where;
int recursion;
off_t msg_size;
int junk_cmds;
char *recipient; /* recipient address */
char *etrn_name; /* client ETRN argument */
char *protocol; /* SMTP or ESMTP */
char *where; /* protocol stage */
int recursion; /* Kellerspeicherpegelanzeiger */
off_t msg_size; /* MAIL FROM message size */
int junk_cmds; /* counter */
/*
* SASL specific.
*/
#ifdef USE_SASL_AUTH
#if SASL_VERSION_MAJOR >= 2
const char *sasl_mechanism_list;
@ -98,6 +102,10 @@ typedef struct SMTPD_STATE {
VSTRING *sasl_encoded;
VSTRING *sasl_decoded;
#endif
/*
* Specific to smtpd access checks.
*/
int rcptmap_checked;
int warn_if_reject; /* force reject into warning */
SMTPD_DEFER defer_if_reject; /* force reject into deferral */
@ -111,13 +119,17 @@ typedef struct SMTPD_STATE {
int saved_flags; /* postponed hold/discard */
VSTRING *expand_buf; /* scratch space for $name expansion */
/* Pass-through proxy client. */
/*
* Pass-through proxy client.
*/
VSTREAM *proxy; /* proxy handle */
VSTRING *proxy_buffer; /* proxy query/reply buffer */
char *proxy_mail; /* owned by mail_cmd() */
int proxy_xforward_features; /* XFORWARD proxy state */
/* XFORWARD server state. */
/*
* XFORWARD server state.
*/
SMTPD_XFORWARD_ATTR xforward; /* up-stream logging info */
} SMTPD_STATE;
@ -221,9 +233,9 @@ extern void smtpd_peer_reset(SMTPD_STATE *state);
#define FORWARD_HELO(s) FORWARD_CLIENT_ATTR((s), helo_name)
#define FORWARD_IDENT(s) FORWARD_IDENT_ATTR(s)
extern void smtpd_xforward_init(SMTPD_STATE *state);
extern void smtpd_xforward_preset(SMTPD_STATE *state);
extern void smtpd_xforward_reset(SMTPD_STATE *state);
extern void smtpd_xforward_init(SMTPD_STATE *);
extern void smtpd_xforward_preset(SMTPD_STATE *);
extern void smtpd_xforward_reset(SMTPD_STATE *);
/*
* Transparency: before mail is queued, do we check for unknown recipients,

31
postfix/src/smtpd/smtpd_check.c
View File

@ -9,6 +9,9 @@
/*
/* void smtpd_check_init()
/*
/* int smtpd_check_addr(address)
/* const char *address;
/*
/* char *smtpd_check_client(state)
/* SMTPD_STATE *state;
/*
@ -39,6 +42,9 @@
/* smtpd_check_init() initializes. This function should be called
/* once during the process life time.
/*
/* smtpd_check_addr() sanity checks an email address and returns
/* non-zero in case of badness.
/*
/* Each of the following routines scrutinizes the argument passed to
/* an SMTP command such as HELO, MAIL FROM, RCPT TO, or scrutinizes
/* the initial client connection request. The administrator can
@ -3404,6 +3410,31 @@ static int generic_checks(SMTPD_STATE *state, ARGV *restrictions,
return (status);
}
/* smtpd_check_addr - address sanity check */
int smtpd_check_addr(const char *addr)
{
const RESOLVE_REPLY *resolve_reply;
char *myname = "smtpd_check_addr";
int status;
if (msg_verbose)
msg_info("%s: addr=%s", myname, addr);
/*
* Catch syntax errors early on if we can, but be prepared to re-compute
* the result later when the cache fills up with lots of recipients, at
* which time errors can still happen.
*/
if (addr == 0 || *addr == 0)
return (0);
resolve_reply = (const RESOLVE_REPLY *)
ctable_locate(smtpd_resolve_cache, addr);
if (resolve_reply->flags & RESOLVE_FLAG_ERROR)
return (-1);
return (0);
}
/* smtpd_check_client - validate client name or address */
char *smtpd_check_client(SMTPD_STATE *state)

1
postfix/src/smtpd/smtpd_check.h
View File

@ -13,6 +13,7 @@
* External interface.
*/
extern void smtpd_check_init(void);
extern int smtpd_check_addr(const char *);
extern char *smtpd_check_client(SMTPD_STATE *);
extern char *smtpd_check_helo(SMTPD_STATE *, char *);
extern char *smtpd_check_mail(SMTPD_STATE *, char *);

3
postfix/src/trivial-rewrite/resolve.c
View File

@ -357,7 +357,8 @@ static void resolve_addr(RES_CONTEXT *rp, char *addr,
tok822_internalize(nextrcpt, tree, TOK822_STR_DEFL);
rcpt_domain = strrchr(STR(nextrcpt), '@') + 1;
if (*rcpt_domain == '[' ? !valid_hostliteral(rcpt_domain, DONT_GRIPE) :
!valid_hostname(rcpt_domain, DONT_GRIPE))
(!valid_hostname(rcpt_domain, DONT_GRIPE)
|| valid_hostaddr(rcpt_domain, DONT_GRIPE)))
*flags |= RESOLVE_FLAG_ERROR;
tok822_free_tree(tree);
tree = 0;