After completely shutting the server down for an entire period of about 12 hours, I brought it back up and it immediately resumed with the same errors. Then I had an idea, what if I turn off the firewall (iptables)? Well that didn't change anything but it did make me consider some other network related issues. When all my network tests and checks turned out to be working perfectly, I started looking at the server configuration.
I switched the configuration of mwesd from using the MTA hostname as mail.mydomain.com to localhost. Suddenly thoussands of messages went forth. So at least we are sending and receiving email again.
BUT two questions now plague me, first: Why did it work for more than 30 days with the other setting and then "break"? No dns changes have been made, nothing to the hosts file, and in fact I haven't had to login to that server since I updated mwesd over a month ago! So why did it work and then suddenly stop?!
Secondly, why do i still see all these same errors? Here's a snippet from the maillog file (with emails masked, etc.)
Code: Select all
...snip...
Sep 24 08:05:45 mailserver sendmail[3565]: o8OD5gSN003565: collect: premature EOM: unexpected close
Sep 24 08:05:45 mailserver sendmail[3565]: o8OD5gSN003565: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:05:45 mailserver sendmail[3565]: o8OD5gSN003565: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:05:49 mailserver sendmail[3563]: o8OD5XOV003563: collect: premature EOM: unexpected close
Sep 24 08:05:49 mailserver sendmail[3563]: o8OD5XOV003563: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:05:49 mailserver sendmail[3563]: o8OD5XOV003563: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:05:49 mailserver sendmail[3567]: o8OD5ksH003567: collect: premature EOM: unexpected close
Sep 24 08:05:49 mailserver sendmail[3567]: o8OD5ksH003567: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:05:49 mailserver sendmail[3567]: o8OD5ksH003567: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:05:59 mailserver sendmail[3571]: o8OD5tWK003571: collect: premature EOM: unexpected close
Sep 24 08:05:59 mailserver sendmail[3571]: o8OD5tWK003571: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:05:59 mailserver sendmail[3571]: o8OD5tWK003571: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:03 mailserver sendmail[3573]: o8OD61tC003573: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:04 mailserver sendmail[3573]: o8OD61tD003573: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:05 mailserver sendmail[3573]: o8OD61tE003573: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:06:05 mailserver sendmail[3573]: o8OD61tE003573: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:05 mailserver sendmail[3569]: o8OD5nuW003569: collect: premature EOM: unexpected close
Sep 24 08:06:05 mailserver sendmail[3569]: o8OD5nuW003569: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:06:05 mailserver sendmail[3569]: o8OD5nuW003569: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:16 mailserver sendmail[3577]: o8OD6Epq003577: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:17 mailserver sendmail[3577]: o8OD6Epr003577: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:18 mailserver sendmail[3577]: o8OD6Eps003577: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:06:18 mailserver sendmail[3577]: o8OD6Eps003577: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:21 mailserver sendmail[3575]: o8OD66HQ003575: collect: premature EOM: unexpected close
Sep 24 08:06:21 mailserver sendmail[3575]: o8OD66HQ003575: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:06:21 mailserver sendmail[3575]: o8OD66HQ003575: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:38 mailserver sendmail[3579]: o8OD6MlY003579: collect: premature EOM: unexpected close
Sep 24 08:06:38 mailserver sendmail[3579]: o8OD6MlY003579: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:06:38 mailserver sendmail[3579]: o8OD6MlY003579: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:40 mailserver sendmail[3586]: o8OD6dli003586: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:42 mailserver sendmail[3586]: o8OD6dlj003586: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:43 mailserver sendmail[3586]: o8OD6dlk003586: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:06:43 mailserver sendmail[3586]: o8OD6dlk003586: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:06:56 mailserver sendmail[3588]: o8OD6dFr003588: collect: premature EOM: unexpected close
Sep 24 08:06:56 mailserver sendmail[3588]: o8OD6dFr003588: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:06:56 mailserver sendmail[3588]: o8OD6dFr003588: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:07 mailserver sendmail[3593]: o8OD6uXr003593: collect: premature EOM: unexpected close
Sep 24 08:07:07 mailserver sendmail[3593]: o8OD6uXr003593: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:07:07 mailserver sendmail[3593]: o8OD6uXr003593: from=<_email_masked_>, size=5, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:08 mailserver sendmail[3597]: o8OD78Mj003597: localhost.localdomain [127.0.0.1] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
Sep 24 08:07:11 mailserver sendmail[3601]: o8OD7A66003601: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:12 mailserver sendmail[3601]: o8OD7A67003601: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:13 mailserver sendmail[3601]: o8OD7A68003601: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:07:13 mailserver sendmail[3601]: o8OD7A68003601: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:13 mailserver sendmail[3595]: o8OD77DX003595: collect: premature EOM: unexpected close
Sep 24 08:07:13 mailserver sendmail[3595]: o8OD77DX003595: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:07:13 mailserver sendmail[3595]: o8OD77DX003595: from=<_email_masked_>, size=5, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:18 mailserver sendmail[3603]: o8OD7DTS003603: collect: premature EOM: unexpected close
Sep 24 08:07:18 mailserver sendmail[3603]: o8OD7DTS003603: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:07:18 mailserver sendmail[3603]: o8OD7DTS003603: from=<_email_masked_>, size=5, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:23 mailserver sendmail[3605]: o8OD7ISU003605: collect: premature EOM: unexpected close
Sep 24 08:07:23 mailserver sendmail[3605]: o8OD7ISU003605: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:07:23 mailserver sendmail[3605]: o8OD7ISU003605: from=<_email_masked_>, size=5, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:07:30 mailserver sendmail[3607]: o8OD7NNv003607: collect: premature EOM: unexpected close
Sep 24 08:07:30 mailserver sendmail[3607]: o8OD7NNv003607: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:07:30 mailserver sendmail[3607]: o8OD7NNv003607: from=<_email_masked_>, size=5, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:08:03 mailserver sendmail[3549]: o8NIhNVn024096: to=<_email_masked_> (10000/100), delay=18:24:38, xdelay=00:04:05, mailer=esmtp, pri=1917961, relay=otherdomain.com. [207.46.31.61], dsn=4.0.0, stat=Deferred: Connection timed out with otherdomain.com.
Sep 24 08:08:04 mailserver sendmail[3610]: o8OD7Xpg003610: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:08:46 mailserver sendmail[3617]: o8OD8jaU003617: from=<_email_masked_>, size=6945, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:09:03 mailserver sendmail[3621]: o8OD92nm003621: from=<_email_masked_>, size=405, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:09:14 mailserver sendmail[3610]: o8OD7Xph003610: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:09:14 mailserver sendmail[3610]: o8OD7Xph003610: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:09:17 mailserver sendmail[3623]: o8OD9G9m003623: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:09:17 mailserver sendmail[3623]: o8OD9G9m003623: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=SMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:09:44 mailserver sendmail[3630]: o8OD9hn8003630: from=<_email_masked_>, size=7552, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:09:55 mailserver sendmail[3632]: o8OD9pRT003632: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:09:58 mailserver sendmail[3632]: o8OD9pRU003632: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:10:03 mailserver sendmail[3632]: o8OD9pRV003632: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:10:03 mailserver sendmail[3632]: o8OD9pRV003632: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:10:05 mailserver sendmail[3639]: o8ODA3Ic003639: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:10:06 mailserver sendmail[3639]: o8ODA3Id003639: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:10:07 mailserver sendmail[3639]: o8ODA3Ie003639: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:10:07 mailserver sendmail[3639]: o8ODA3Ie003639: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:10:31 mailserver sendmail[3628]: o8OD9YmK003628: localhost.localdomain [127.0.0.1] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
Sep 24 08:12:06 mailserver sendmail[3648]: o8ODC0Vt003648: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:08 mailserver sendmail[3648]: o8ODC0Vu003648: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:09 mailserver sendmail[3650]: o8ODC9nT003650: localhost.localdomain [127.0.0.1] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
Sep 24 08:12:10 mailserver sendmail[3648]: o8ODC0Vv003648: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:12:10 mailserver sendmail[3648]: o8ODC0Vv003648: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:27 mailserver sendmail[3654]: o8ODCOm3003654: collect: premature EOM: unexpected close
Sep 24 08:12:27 mailserver sendmail[3654]: o8ODCOm3003654: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:12:27 mailserver sendmail[3654]: o8ODCOm3003654: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:30 mailserver sendmail[3658]: o8ODCRPl003658: collect: premature EOM: unexpected close
Sep 24 08:12:30 mailserver sendmail[3658]: o8ODCRPl003658: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:12:30 mailserver sendmail[3658]: o8ODCRPl003658: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:33 mailserver sendmail[3660]: o8ODCUCY003660: collect: premature EOM: unexpected close
Sep 24 08:12:33 mailserver sendmail[3660]: o8ODCUCY003660: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:12:33 mailserver sendmail[3660]: o8ODCUCY003660: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:41 mailserver sendmail[3656]: o8ODCQiJ003656: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:12:41 mailserver sendmail[3656]: o8ODCQiJ003656: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:42 mailserver sendmail[3666]: o8ODCeCh003666: collect: premature EOM: unexpected close
Sep 24 08:12:42 mailserver sendmail[3666]: o8ODCeCh003666: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:12:42 mailserver sendmail[3666]: o8ODCeCh003666: from=<_email_masked_>, size=5, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:46 mailserver sendmail[3670]: o8ODCfK5003670: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:52 mailserver sendmail[3670]: o8ODCfK6003670: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:12:54 mailserver sendmail[3670]: o8ODCfK7003670: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:12:54 mailserver sendmail[3670]: o8ODCfK7003670: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:13:49 mailserver sendmail[3672]: o8ODDlsw003672: from=<_email_masked_>, size=393, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:13:59 mailserver sendmail[3674]: o8ODDsj3003674: collect: premature EOM: unexpected close
Sep 24 08:13:59 mailserver sendmail[3674]: o8ODDsj3003674: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:13:59 mailserver sendmail[3674]: o8ODDsj3003674: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:06 mailserver sendmail[3680]: o8ODE4CO003680: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:07 mailserver sendmail[3680]: o8ODE4CP003680: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:08 mailserver sendmail[3680]: o8ODE4CQ003680: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:14:08 mailserver sendmail[3680]: o8ODE4CQ003680: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:09 mailserver sendmail[3678]: o8ODE019003678: collect: premature EOM: unexpected close
Sep 24 08:14:09 mailserver sendmail[3678]: o8ODE019003678: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:14:09 mailserver sendmail[3678]: o8ODE019003678: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:32 mailserver sendmail[3682]: o8ODEUat003682: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:33 mailserver sendmail[3682]: o8ODEUau003682: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:34 mailserver sendmail[3682]: o8ODEUav003682: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:14:34 mailserver sendmail[3682]: o8ODEUav003682: from=<_email_masked_>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:42 mailserver sendmail[3684]: o8ODEdmi003684: collect: premature EOM: unexpected close
Sep 24 08:14:42 mailserver sendmail[3684]: o8ODEdmi003684: collect: unexpected close on connection from localhost.localdomain, sender=<_email_masked_>
Sep 24 08:14:42 mailserver sendmail[3684]: o8ODEdmi003684: from=<_email_masked_>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:14:57 mailserver sendmail[3686]: o8ODEt09003686: from=<_email_masked_>, size=394, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 24 08:15:43 mailserver sendmail[3697]: o8ODFPcf003697: lost input channel from localhost.localdomain [127.0.0.1] to MTA after mail
Sep 24 08:15:43 mailserver sendmail[3697]: o8ODFPcf003697: from=<_email_masked_>, size=2517, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
...snip...
So can anyone suggest what to do about this issue? This is basically all my maillogs contain!