The time reported by mailq seems confusing. Sometimes it seems to be reporting in system time and sometimes UTC time?
rwp@havoc:~$ mailq -Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- 7C0CC451* 75575 Wed Mar 10 00:54:52 mailman-boun...@gnu.org ml...@lh.proulx.com rwp@havoc:~$ grep 7C0CC451 /var/log/mail.log Mar 9 17:54:52 havoc postfix/smtpd[12886]: 7C0CC451: client=eggs.gnu.org[209.51.188.92] Mar 9 17:54:52 havoc postfix/cleanup[12887]: 7C0CC451: message-id=<mailman.12285.1615337667.5833.libmicroht...@gnu.org> Mar 9 17:54:52 havoc postfix/qmgr[31282]: 7C0CC451: from=<mailman-boun...@gnu.org>, size=75575, nrcpt=1 (queue active) Mar 9 17:55:35 havoc postfix/local[12529]: 7C0CC451: to=<ml...@lh.proulx.com>, relay=local, delay=43, delays=0.22/0/0/43, dsn=2.0.0, status=sent (delivered to command: IFS=' ';exec /usr/bin/procmail || exit 75 #mlmgr) Mar 9 17:55:35 havoc postfix/qmgr[31282]: 7C0CC451: removed Okay. The above looks like UTC. rwp@havoc:~$ date -R Tue, 09 Mar 2021 17:55:27 -0700 rwp@havoc:~$ date -Ru -d 'Tue, 09 Mar 2021 17:55:27 -0700' Wed, 10 Mar 2021 00:55:27 +0000 But it isn't always so. rwp@havoc:~$ mailq -Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- 013A7451* 26102 Tue Mar 9 23:07:38 mailman-boun...@gnu.org ml...@lh.proulx.com rwp@havoc:~$ grep 013A7451 /var/log/mail.log Mar 9 23:07:38 havoc postfix/smtpd[639]: 013A7451: client=eggs.gnu.org[209.51.188.92] Mar 9 23:07:38 havoc postfix/cleanup[600]: 013A7451: message-id=<mailman.21072.1615356380.30133.help-shi...@gnu.org> Mar 9 23:07:39 havoc postfix/qmgr[31282]: 013A7451: from=<mailman-boun...@gnu.org>, size=26102, nrcpt=1 (queue active) Mar 9 23:07:57 havoc postfix/local[8169]: 013A7451: to=<ml...@lh.proulx.com>, relay=local, delay=19, delays=1.9/0.02/0/17, dsn=2.0.0, status=sent (delivered to command: IFS=' ';exec /usr/bin/procmail || exit 75 #mlmgr) Mar 9 23:07:57 havoc postfix/qmgr[31282]: 013A7451: removed If it were always one way or the other I would have ignored the timezone difference. But it seems to only sometimes be one way and sometimes the other way? Yes I am on an older version of Postfix 3.1.15 on an older system that I am behind on updating. But I wouldn't expect this part of the code path to have changed recently. Thanks! Bob P.S. Normally I am a UTC or GTFO for servers too. That avoids all of these types of questions. But this one is set to local time. I am being bad on it.