Date: Fri, 11 Sep 1998 14:21:35 +1000 From: "Brett Gray" <beatteam@austasia.net> To: "FreeBSD -Questions" <freebsd-questions@FreeBSD.ORG> Subject: MTU Size & Connection reset by.. & Lost Input channel Message-ID: <199809110423.VAA05304@hub.freebsd.org>
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I have just set up a mail server for a client under FreeBSD 2.2.2 running
sendmail 8.8.5
I have done this many times before without problems...except this time
Can anyone help with:
a) I can send mail out of the mail server but I cant get any incoming mail.
I keep getting error messages saying "Deferred: Connection reset by..."
on mail servers trying to get mail INTO the problem machine.. Why?
If I try to send a message from hotmail INTO the problem machine I get
the following message in the maillog file:
Sep 11 14:13:15 trycala sendmail[184]: --> 421 Lost input channel from
f200.hotmail.com [207.82.251.91]
Sep 11 14:13:15 trycala sendmail[184]: lost input channel from
f200.hotmail.com
[207.82.251.91]
b) I read something on the net about MTU size. What is MTU (I can find any
explaination
of the term.. just references to it) Is the above problem likely to be
something to do
with MTU size and where can I adjust this setting in FreeBSD
Any help would be greatly appreciated.
Brett Gray
beatteam@austasia.net
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