Date: Thu, 2 Jul 2009 08:33:41 -0700 From: "Alex Teslik" <alex@acatysmoof.com> To: "List freebsd-questions" <freebsd-questions@freebsd.org> Subject: intermittent failures with sendmail Message-ID: <20090702143840.M99932@acatysmoof.com>
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I have sendmail 8.14.2 running on freebsd 7.0:
[gouda:root]/var/spool/mqueue# sendmail -d0 < /dev/null
Version 8.14.2
Compiled with: DNSMAP LOG MAP_REGEX MATCHGECOS MILTER MIME7TO8 MIME8TO7
NAMED_BIND NETINET NETINET6 NETUNIX NEWDB NIS PIPELINING SASLv2
SCANF STARTTLS TCPWRAPPERS USERDB XDEBUG
============ SYSTEM IDENTITY (after readcf) ============
(short domain name) $w = gouda
(canonical domain name) $j = gouda.acatysmoof.com
(subdomain name) $m = acatysmoof.com
(node name) $k = gouda.acatysmoof.com
========================================================
[gouda:root]/var/spool/mqueue# uname -a
FreeBSD gouda.acatysmoof.com 7.0-STABLE-200806 FreeBSD 7.0-STABLE-200806 #0: Mon Jun 30
03:43:40 PDT 2008 alex@XXXXXXX.com:/usr/obj/usr/src/sys/CORE2-STABLE-7 i386
mails sent out to the internet are intermittently causing these error reports in the daily run output:
n5UNkYTo069809 23878 Tue Jun 30 16:46 <alex@XXXXX.com>
(reply: read error from mail.OOOOOO.net.)
<rad@OOOOOO.net>
n5ULKB0i064252* 7028205 Tue Jun 30 14:20 <kitty@BBBBBBBB.com>
8BITMIME (timeout writing message to c.mx.mail.yahoo.com.: Broken pipe)
<XXXXXX@yahoo.com>
n5TM36Jn012370 420 Mon Jun 29 15:03 <XXXXXXX@acat
(Deferred: Name server: YYYYYYY.com.: host name lookup failur)
<avalderrama@YYYYYY.com>
The yahoo one is particularly puzzling. Most mails make it, but some fail. I can't figure out why. The
recipient is valid and they have plenty of space in their account. Sometimes mail to them works with
no problem.
I checked the sendmail logs and found:
Jul 2 03:35:16 gouda sm-mta[40342]: n5ULKB0i064252: SYSERR(root): timeout writing message to
b.mx.mail.yahoo.com.: Broken pipe
Jul 2 04:23:01 gouda sm-mta[47860]: n5ULKB0i064252: SYSERR(root): timeout writing message to
e.mx.mail.yahoo.com.: Broken pipe
Jul 2 07:03:05 gouda sm-mta[53788]: n5ULKB0i064252: SYSERR(root): timeout writing message to
d.mx.mail.yahoo.com.: Broken pipe
I thought it might be an MTU problem:
http://anthony.zerosandones.co.uk/?q=node/451
I set my MTU to 1300, but that hasn't helped.
[gouda:root]/home/alex/acatysmoof.com/services# ifconfig -a
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1300
options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
ether 00:1c:c0:36:85:62
inet 24.205.141.134 netmask 0xfffffffc broadcast 24.205.141.135
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
DNS is working fine everywhere, so I don't think thats it. PTR is fine, reverse lookups work fine.
I've googled my brains out. Does anyone have any ideas?
Thanks,
Alex
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