sendmail Broken Pipe Error

From: Willy Offermans <Willy_at_Offermans.Rompen.nl>
Date: Tue, 25 Mar 2014 11:39:34 +0100
Dear FreeBSD friends,

I found the following command, that generates some more informative output,
I hope.

root_at_MyServer:/home/MyName # sendmail -q -v

Running /var/spool/mqueue/s2ODs1hH016114 (sequence 1 of 2)
<MyFriend_at_MyFriendsDomainName>... Connecting to Smarhost.com via relay...
220 CPSMTPM-CMT109.MyProvider.com MyProvider.com Tue, 25 Mar 2014 10:45:21
+0100 
>>> EHLO MyServer.MyDomain.com
250-CPSMTPM-CMT109.MyProvider.com Hello [77.170.60.162]
250-TURN
250-SIZE 15744000
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-CHUNKING
250-VRFY
250 OK
>>> MAIL From:<MyName_at_MyRewrittenDomainName> SIZE=1254972
250 2.1.0 MyName_at_MyRewrittenDomainName....Sender OK
>>> RCPT To:<MyFriend_at_MyFriendsDomainName>
>>> DATA
250 2.1.5 MyFriend_at_MyFriendsDomainName 
354 Start mail input; end with <CRLF>.<CRLF>
timeout writing message to Smarhost.com: Broken pipe
<MyFriend_at_MyFriendsDomainName>... Deferred

If I copy the *s2ODs1hH016114 files to MySecondServer and run 
sendmail -q -v once more, I got the following:

Running /var/spool/mqueue/s2ODs1hH016114 (sequence 1 of 1)
<MyFriend_at_MyFriendsDomainName>... Connecting to Smarhost.com via relay...
220 CPSMTPM-cmt107.MyProvider.com MyProvider.com Tue, 25 Mar 2014 10:57:56
+0100 
>>> EHLO MySecondServer.MyRewrittenDomainName
250-CPSMTPM-cmt107.MyProvider.com Hello [77.170.60.162]
250-TURN
250-SIZE 15744000
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-CHUNKING
250-VRFY
250 OK
>>> MAIL From:<MyName_at_MyRewrittenDomainName> SIZE=1254972
250 2.1.0 MyName_at_MyRewrittenDomainName....Sender OK
>>> RCPT To:<MyFriend_at_MyFriendsDomainName>
>>> DATA
250 2.1.5 MyFriend_at_MyFriendsDomainName 
354 Start mail input; end with <CRLF>.<CRLF>
>>> .
250 2.6.0  <20140324135355.GC6581_at_vpn.MyDomain.com> Queued mail for delivery
<MyFriend_at_MyFriendsDomainName>... Sent ( <20140324135355.GC6581_at_vpn.MyDomain.com>
Queued mail for delivery)
Closing connection to Smarhost.com
>>> QUIT
221 2.0.0 CPSMTPM-cmt107.MyProvider.com Service closing transmission
channel

The test shows me that the problem is not on the MyProvider side.

The sendmail.cf files on the two server are identical, except the names of the 
servers and some comments.

The sendmail versions are different and the FreeBSD versions are different:
MyServer:
Sendmail Version 8.14.7
FreeBSD 10.0-STABLE

MySecondServer:
Sendmail Version 8.14.5
FreeBSD 9.0-RELEASE-p4

It is also important to note that above can only be observed for some
e-mails, not all. Thus some mails will be sent from MyServer, some are not!

If I make a tcpdump during the connection between sendmail and smarthost
concerning s2ODs1hH016114, I got the following:

11:24:23.301300 IP MyServer.MyDomain.com.49165 > DNSMyProvider.domain: 32794+ [1au] MX? Smarhost.com. (43)
11:24:23.320078 IP DNSMyProvider.domain > MyServer.MyDomain.com.49165: 32794 1/1/1 CNAME CNameMyProvider. (125)
11:24:23.321592 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [S], seq 2245424203, win 65535, options [mss 1448,nop,wscale 6,sackOK,TS val 318826742 ecr 0], length 0
11:24:23.339171 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [S.], seq 2238169153, ack 2245424204, win 8192, options [mss 1452], length 0
11:24:23.339221 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], ack 1, win 65535, length 0
11:24:23.355143 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [P.], seq 1:84, ack 1, win 65160, length 83
11:24:23.355254 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [P.], seq 1:24, ack 84, win 65535, length 23
11:24:23.370795 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [P.], seq 84:276, ack 24, win 65137, length 192
11:24:23.371025 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [P.], seq 24:76, ack 276, win 65535, length 52
11:24:23.392751 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [P.], seq 276:326, ack 76, win 65085, length 50
11:24:23.393010 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [P.], seq 76:119, ack 326, win 65535, length 43
11:24:23.414297 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [P.], seq 326:364, ack 119, win 65042, length 38
11:24:23.520345 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], ack 364, win 65535, length 0
11:24:23.535218 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [P.], seq 364:410, ack 119, win 65042, length 46
11:24:23.769098 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 119:1567, ack 410, win 65535, length 1448
11:24:23.769108 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 119:1567, ack 410, win 65535, length 1448
11:24:23.811918 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 1567, win 65160, length 0
11:24:24.077092 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 1567:3015, ack 410, win 65535, length 1448
11:24:24.077101 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 1567:3015, ack 410, win 65535, length 1448
11:24:24.119910 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 3015, win 65160, length 0
11:24:24.451090 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 3015:4463, ack 410, win 65535, length 1448
11:24:24.451100 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 3015:4463, ack 410, win 65535, length 1448
11:24:24.493910 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 4463, win 65160, length 0
11:24:24.957099 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 4463:5911, ack 410, win 65535, length 1448
11:24:24.957110 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 4463:5911, ack 410, win 65535, length 1448
11:24:24.999924 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 5911, win 65160, length 0
11:24:25.727077 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 5911:7359, ack 410, win 65535, length 1448
11:24:25.727085 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 5911:7359, ack 410, win 65535, length 1448
11:24:25.769595 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 7359, win 65160, length 0
11:24:26.929090 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 7359:8807, ack 410, win 65535, length 1448
11:24:26.929099 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 7359:8807, ack 410, win 65535, length 1448
11:24:26.972062 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 8807, win 65160, length 0
11:24:29.100086 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 8807:10255, ack 410, win 65535, length 1448
11:24:29.100093 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 8807:10255, ack 410, win 65535, length 1448
11:24:29.142755 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 10255, win 65160, length 0
11:24:33.205088 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 10255:11703, ack 410, win 65535, length 1448
11:24:33.205100 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 10255:11703, ack 410, win 65535, length 1448
11:24:33.247458 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 11703, win 65160, length 0
11:24:41.127081 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 11703:13151, ack 410, win 65535, length 1448
11:24:41.127091 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 11703:13151, ack 410, win 65535, length 1448
11:24:41.169601 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 13151, win 65160, length 0
11:24:56.729079 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 13151:14599, ack 410, win 65535, length 1448
11:24:56.729086 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 13151:14599, ack 410, win 65535, length 1448
11:24:56.771445 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 14599, win 65160, length 0
11:25:12.331083 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 14599:16047, ack 410, win 65535, length 1448
11:25:12.331094 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 14599:16047, ack 410, win 65535, length 1448
11:25:12.373602 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 16047, win 65160, length 0
11:25:27.933084 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 16047:17495, ack 410, win 65535, length 1448
11:25:27.933095 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [.], seq 16047:17495, ack 410, win 65535, length 1448
11:25:27.975453 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 17495, win 65160, length 0
11:25:43.535093 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [R.], seq 20391, ack 410, win 65535, length 0
11:25:43.549940 IP ActualSmarthost.com.smtp > MyServer.MyDomain.com.51274: Flags [.], ack 17495, win 65160, length 0
11:25:43.550002 IP MyServer.MyDomain.com.51274 > ActualSmarthost.com.smtp: Flags [R], seq 2245441698, win 0, length 0

I'm not an expert in tcpdump. Can anyone make sense out of the messages?


-- 
Met vriendelijke groeten,
With kind regards,
Mit freundlichen Gruessen,
De jrus wah,

Wiel

*************************************
 W.K. Offermans
Received on Tue Mar 25 2014 - 09:40:58 UTC

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