@@ -1033,7 +1039,7 @@ Berkeley DB library version.
-To set kernel parameters at boot time, add the following lines to -the /boot/loader.conf file (this is specific to FreeBSD 4.x): +To set the following kernel parameters at boot time, add the +following lines to the /boot/loader.conf file (this is +specific to FreeBSD 4.x):
kern.ipc.maxsockets="5000" -kern.maxfiles="16384" -kern.maxfilesperproc="16384" kern.ipc.nmbclusters="65536"
-To set kernel parameters at run time execute the following commands -as root (this is specific to FreeBSD 4.x): +These parameters cannot be set at run time (verified with FreeBSD +4.2). + +
+ +To set the following kernel parameters at run time execute the +following commands as root (this is specific to FreeBSD 4.x):
+-# sysctl -w kern.ipc.maxsockets=5000 # sysctl -w kern.maxfiles=16384 # sysctl -w kern.maxfilesperproc=16384 -# sysctl -w kern.ipc.nmbclusters=65536
+ +These parameters cannot be set from /boot/loader.conf +(verified with FreeBSD 4.2). + +
+ +Other kernel parameters such as kern.maxproc can be increased +only by recompiling the kernel with a different maxusers +setting in the kernel configuration file (verified with FreeBSD 4.2). +
+ +QMQPD(8) QMQPD(8) + +NAME + qmqpd - Postfix QMQP server + +SYNOPSIS + qmqpd [generic Postfix daemon options] + +DESCRIPTION + The Postfix QMQP server receives one message per connec- + tion. Each message is piped through the cleanup(8) dae- + mon, and is placed into the incoming queue as one single + queue file. The program expects to be run from the mas- + ter(8) process manager. + + The QMQP server implements one access policy: only explic- + itly authorized client hosts are allowed to use the ser- + vice. + +SECURITY + The QMQP server is moderately security-sensitive. It talks + to QMQP clients and to DNS servers on the network. The + QMQP server can be run chrooted at fixed low privilege. + +DIAGNOSTICS + Problems and transactions are logged to syslogd(8). + +BUGS + The QMQP protocol provides only one server reply per mes- + sage delivery. It is therefore not possible to reject + individual recipients. + + The QMQP protocol requires the server to receive the + entire message before replying. If a message is malformed, + or if any netstring component is longer than acceptable, + Postfix replies immediately and closes the connection. It + is left up to the client to handle the situation. + +CONFIGURATION PARAMETERS + The following main.cf parameters are especially relevant + to this program. See the Postfix main.cf file for syntax + details and for default values. Use the postfix reload + command after a configuration change. + +Miscellaneous + always_bcc + Address to send a copy of each message that enters + the system. + + debug_peer_level + Increment in verbose logging level when a remote + host matches a pattern in the debug_peer_list + parameter. + + debug_peer_list + List of domain or network patterns. When a remote + host matches a pattern, increase the verbose log- + ging level by the amount specified in the + debug_peer_level parameter. + + hopcount_limit + Limit the number of Received: message headers. + + qmqpd_authorized_clients + A list of domain or network patterns that specifies + what clients are allowed to use the service. + + qmqpd_timeout + Limit the time to send a server response and to + receive a client request. + + soft_bounce + Change hard (D) reject responses into soft (Z) + reject responses. This can be useful for testing + purposes. + +Content inspection controls + content_filter + The name of a mail delivery transport that filters + mail and that either bounces mail or re-injects the + result back into Postfix. This parameter uses the + same syntax as the right-hand side of a Postfix + transport table. + +Resource controls + line_length_limit + Limit the amount of memory in bytes used for the + handling of partial input lines, and the length of + sender and recipient addresses that are received + from client. + + message_size_limit + Limit the total size in bytes of a message, includ- + ing on-disk storage for sender and recipient + address information. + +Tarpitting + qmqpd_error_sleep_time + Time to wait in seconds before informing the client + of a problem. This slows down run-away errors. + +SEE ALSO + http://cr.yp.to/proto/qmqp.html, QMQP protocol + cleanup(8) message canonicalization + master(8) process manager + syslogd(8) system logging + +LICENSE + The Secure Mailer license must be distributed with this + software. + +AUTHOR(S) + Wietse Venema + IBM T.J. Watson Research + P.O. Box 704 + Yorktown Heights, NY 10598, USA + + 1 + +