Date: Wed, 26 Mar 2014 09:23:42 -0700 From: Gregory Shapiro <gshapiro@freebsd.org> To: Willy Offermans <Willy@Offermans.Rompen.nl>, freebsd-current@freebsd.org Subject: Re: sendmail Broken Pipe Error Message-ID: <20140326162342.GC72635@C02KN7GSDTY3.corp.proofpoint.com> In-Reply-To: <20140326162034.GI60889@funkthat.com> References: <20140325103934.GH8104@vpn.offrom.nl> <20140325164316.GC32089@funkthat.com> <20140326111748.GJ27307@vpn.offrom.nl> <20140326162034.GI60889@funkthat.com>
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> > 11:57:56.539788 IP MyServer.com.41115 > Smarthost.com.smtp: Flags [S], seq 1001452351, win 65535, options [mss 1448,nop,wscale 6,sackOK,TS val 407239960 ecr 0], length 0 > > 11:57:56.555262 IP Smarthost.com.smtp > MyServer.com.41115: Flags [S.], seq 1277075046, ack 1001452352, win 8192, options [mss 1452], length 0 > > It should look something like: > 09:18:34.723280 IP jmgmac.funkthat.com.64724 > h2.funkthat.com.ssh: Flags [.], ack 177, win 33280, options [nop,nop,TS val 1854905469 ecr 3482476972], length 0 > 0x0000: 4510 0034 d7ac 4000 4006 e1af c0a8 0003 E..4..@.@....... > 0x0010: c0a8 0004 fcd4 0016 7e48 238e d872 43dc ........~H#..rC. > 0x0020: 8010 8200 7c08 0000 0101 080a 6e8f 9c7d ....|.......n..} > 0x0030: cf92 61ac ..a. > > Notice the hex output... I didn't see any of that in your output... > The last packet I was talking about is the last one that had length > 1448 that your server sent... Willy mentioned that this only happened on mail with attachments. Could it be an MTU issue? Specifically, see: http://www.sendmail.com/sm/open_source/tips/path_mtu/
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