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Although these two config lines have not changed since `debian:buster-slim` image, Dovecot seems to now be affected by it which results in rejecting cipher suites below TLS v1.2. To continue supporting the `intermediate` TLS_LEVEL, we now need to relax the global config. Dovecot could alternatively be given a modified openssl config to only affect it's interaction with openssl. Postfix is unaffected and continues to support TLS <1.2 cipher suites when configured to.