> On Mar 30, 2021, at 10:33 AM, Jeremy Harris via Exim-users
> <exim-users@exim.org> wrote:
>
> On 30/03/2021 15:02, Felipe Gasper via Exim-users wrote:
>> I’m noticing if I have a server time-skewed into the future, and I send
>> a message to Exim on that server, the SMTP client never receives
>> confirmation of receipt of the message.
>> This causes that client to think the message send failed, though Exim
>> does actually enqueue the message for remote delivery. Thus, the client
>> resends the message, which causes the recipient to receive multiple copies
>> of the message.
>> strace is showing:
>> -----
>> [pid 25596] write(4</var/log/exim_mainlog>, "2021-03-30 10:55:28
>> 1lRGiG-0006eq-QA <= can...@felipe.dev.cpanel.net H=(felipes-mbp.lan)
>> [10.3.4.84]:49684 P=esmtpsa X=TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no
>> A=dovecot_plain:mailer S=381 T=\"Test sent from ./smtp_send_test.pl\" for
>> fel...@felipe.com\n", 254) = 254
>> [pid 25596] rt_sigprocmask(SIG_BLOCK, [ALRM], [], 8) = 0
>> [pid 25596] setitimer(ITIMER_REAL, {it_interval={tv_sec=0, tv_usec=0},
>> it_value={tv_sec=7198, tv_usec=625000}}, NULL) = 0
>> [pid 25596] rt_sigsuspend(~[ALRM RTMIN RT_1], 8
>> -----
>> … and there it hangs. The socket never closes, so the client eventually
>> times out the connection.
>> Has anyone else encountered something of the like? Notwithstanding that
>> clock-skews of 2 hours are their own problem, could Exim maybe handle this a
>> bit more gracefully?
>
>
> What Exim version? What platform?
>
> Behaviour changed in 4.94, for platforms with _POSIX_MONOTONIC_CLOCK.
Exim 4.94
CentOS 7, default kernel (3.10.0-1160.11.1.el7.x86_64)
Incidentally, I’m setting system clock via `date`.
Thank you!
-FG
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