filter not being applied

[Edward Sandberg]

I am attempting to configure content filtering by following this guide:

http://www.postfix.org/FILTER_README.html

I have added the filter service and modified the smtp service in master.cf:

filter    unix  -       n       n       -       10      pipe
        flags=Rq user=filter null_sender=
        argv=/home/filter/filter.sh -f ${sender} -- ${recipient}
smtp      inet  n       -       y       -       -       smtpd
        -o content_filter=filter:dummy



smtp      unix  -       -       y       -       -       smtp
        -o content_filter=filter:dummy
relay     unix  -       -       y       -       -       smtp
        -o syslog_name=postfix/$service_name
        -o content_filter=filter:dummy

but no joy.



When I run the following command:



This is the syslog outout I see:


Feb 10 19:39:04 postfix postfix/qmgr[13849]: 7D1D0E0E6F: removed

What am I missing?

and reloaded postfix. When that didn't work I tried editing master.cf.proto instead but still no change in behavior. I also tried adding the filter option to these services: The mail is being sent but the filter is not being used. I can delete the filter script, mail still gets sent and no difference in behavior occurs. I would expect some kind of error if the filter script can't be found so I think its not even trying to use the filter. echo "body of your email" | mail -s "This is a subject too" -a "From:redac...@redacted.com" redac...@redacted.com Feb 10 19:39:03 postfix postfix/pickup[13850]: 7D1D0E0E6F: uid=0 from=<redac...@redacted.com> Feb 10 19:39:03 postfix postfix/cleanup[13903]: 7D1D0E0E6F: message-id=<20220210193903.7d1d0e0...@postfix.redacted.net> Feb 10 19:39:03 postfix postfix/qmgr[13849]: 7D1D0E0E6F: from=<redac...@redacted.com>, size=393, nrcpt=1 (queue active) Feb 10 19:39:04 postfix postfix/smtp[13905]: 7D1D0E0E6F: to=<redac...@redacted.com>, relay=ASPMX.L.GOOGLE.com[173.194.219.26]:25, delay=0.61, delays=0.03/0.03/0.24/0.31, dsn=2.0.0, status=sent (250 2.0.0 OK 1644521944 i1si9676536ybt.537 - gsmtp)

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