On 25 January 2018 at 16:42, Dominic Raferd <domi...@timedicer.co.uk> wrote: > > > > On 25 January 2018 at 16:02, Zach Sheppard <zshepp...@g.oconee.k12.sc.us> > wrote: >> >> Is it possible to exempt one sender from receiving non-delivery >> notifications? We have a DMARC policy that forces DKIM headers on all mail >> and when Postfix sends a non-delivery notification to this bulk mail sender >> (a fake e-mail alias) it fails because of our DMARC policy. >> >> I have set notify_classes= to not receive any e-mails about errors/bounces >> but it looks like the non-delivery notifications still occur. >> >> How could I block one sender from receiving those notifications? > > > Rather than remove the notifications you could make them DMARC compliant with: > internal_mail_filter_classes = bounce > > See http://www.postfix.org/postconf.5.html#internal_mail_filter_classes - > note the warning (presumably because of a loop risk)
Alternatively, or as well, suppress DSN notification to strangers: /etc/postfix/main.cf: smtpd_discard_ehlo_keyword_address_maps = cidr:/etc/postfix/esmtp_access /etc/postfix/esmtp_access # 127.0.0.1 usually will have been re-routed via amavis and re-injected i.e. it started as an external email? 127.0.0.1 silent-discard, dsn 127.0.0.0/31 silent-discard 192.168.0.0/16 silent-discard 0.0.0.0/0 silent-discard, dsn
