So it looks like I had a few lost messages this morning- There was a blip in the network between here and the machine they were talking to. They noticed, and generated a "lost connection with XXX while sending end of data -- message may be sent more than once" message.
The problem is, it doesn't look like it ever re-sent. Is there a way to enable this, and ensure it Does resend?
Jun 13 09:57:11 email amavis: (05874-01) Checking: F4dBFYDZOSZ7 [10.10.0.155] <email@example.com> -> <firstname.lastname@example.org>
Jun 13 09:57:17 email postfix/qmgr: 047A0148629: from=<email@example.com>, size=3250, nrcpt=1 (queue active)
Jun 13 09:57:17 email amavis: (05874-01) FWD via SMTP: <firstname.lastname@example.org> -> <email@example.com>, BODY=8BITMIME 250 2.6.0 Ok, id=05874-01,
from MTA([127.0.0.1]:10025): 250 Ok: queued as 047A0148629
Jun 13 09:57:17 email amavis: (05874-01) Passed CLEAN, LOCAL [zzzzzzzzzzzz] [zzzzzzzzzzzzz] <firstname.lastname@example.org> -> <email@example.com>, Messag
e-ID: <466FF7B6.firstname.lastname@example.org>, mail_id: F4dBFYDZOSZ7, Hits: -4.36, queued_as: 047A0148629, 5673 ms
Jun 13 09:57:23 email postfix/smtp: 047A0148629: to=<email@example.com>, relay=relay.machine.com[18.104.22.168.5], delay=6, status=deferred (lost connection with relay.machine.com[22.214.171.124.5] while sending end of data -- message may be sent more than once)