Willy Offermans wrote this message on Tue, Mar 25, 2014 at 11:39 +0100: > 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 The one odd thing I notice is that there doesn't seem to be a non-MTU sized frame to end the transmission... The chances of that happeneing are slim... 1/1448 in fact... Could this be an issue w/ FreeBSD not sending out the last frame after ack? With out knowing what the last packet contains, it's hard to say... > 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? If you dumped the contents, using -s 0 -X, and look at that last packet you should see 0d 0a 2e 0d 0a at the end.. which is CR/LF/./CR/LF.. If you don't see that, then for some reason sendmail/FreeBSD isn't telling the server that it's done sending which would prevent the receiving side from ack'ing the email causing the timeout... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."Received on Tue Mar 25 2014 - 15:43:19 UTC
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