I’m using the postfix that is part of mac OS Sierra with Server 5.2. Apple has kind of damaged the logging system, so getting logs from sptmd/smtp has become a lot more difficult.
I’ve now found a way to get the logs. While investigating something else, I’ve noticed entries like these in the logs: 2017-03-22 15:09:08.158097+0100 0x5f1534 Info 0x0 7220 smtp: 1051A8D80CA: to=<gerben.wie...@rna.nl>, relay=127.0.0.1[127.0.0.1]:10024, delay=12965, delays=12962/0.19/0.01/3.1, dsn=4.4.2, status=deferred (lost connection with 127.0.0.1[127.0.0.1] while sending end of data -- message may be sent more than once) What could these imply? I don’t have the idea that mail is not coming through. My guess is that this is the link between postfix and amavisd, from main.cf:content_filter = smtp-amavis:[127.0.0.1]:10024 But for the rest: I haven’t been able to establish a pattern. G
