On 12/21/2010 11:46 AM, Stuart Bailey wrote:
Hello,
I have a postfix server accepting emails on port 25 from the
Internet, and
delivering to cyrus.
There is another sever running Mail Marshall on Windows, that
is used as the
content filter. I have configured postfix master.cf as follows:
smtp inet n - n - - smtpd
-o content_filter=mm:[172.16.0.9]:25
-o receive_override_options=no_address_mappings
mm unix - - - - 10 smtp
-o smtp_send_xforward_command=yes
-o disable_mime_output_conversion=yes
-o disable_dns_lookups=yes
-o smtp_generic_maps=
0.0.0.0:10027 inet n - - - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_delay_reject=no
-o smtpd_client_restrictions=permit_mynetworks,reject
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o smtpd_data_restrictions=reject_unauth_pipelining
-o smtpd_end_of_data_restrictions=
-o mynetworks=127.0.0.0/8,172.16.0.0/16
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o smtpd_client_connection_count_limit=0
-o smtpd_client_connection_rate_limit=0
-o
receive_override_options=no_header_body_checks,no_unknown_recipient_checks
Mail marshall is configured to send emails to port 10027. This
works OK.
However, if Mail Marshall detects SPAM, rather than modify the
header and send
it on, it responds directly with a 550 error code.
Unfortunately, postfix then
notifies the email originator that the message has bounced,
generating
backscatter.
Is there anyway I can configure postfix to drop / discard
these messages
rather than notify the originator?
If you can't configure mail marshall to tag+deliver or
quarantine, then it's unsuitable for use as a postfix
content_filter.
You may be able to use mail marshall as a postfix
smtpd_proxy_filter, but that has performance implications you
will need to investigate.
http://www.postfix.org/SMTPD_PROXY_README.html
-- Noel Jones
