"I/O error on connection" problem. MailScanner related?

Steve Campbell campbell at cnpapers.com
Thu Jul 20 19:59:43 IST 2006

----- Original Message ----- 
From: "Chris W. Parker" <cparker at swatgear.com>
To: "MailScanner discussion" <mailscanner at lists.mailscanner.info>
Sent: Thursday, July 20, 2006 2:37 PM
Subject: RE: "I/O error on connection" problem. MailScanner related?

> mikea <mailto:mikea at mikea.ath.cx>
>    on Thursday, July 20, 2006 11:11 AM said:
>> In my logs, "I/O error on connection" typically has a line soon
>> before it with payload something like "collect: premature EOM:
>> Connection reset by <foo>". This certainly would indicate that it's
>> not you. Are you seeing anything of the sort?"
> Interesting. Yes I see these messages. In fact, with a cursory glance
> based on my memory of remote server addresses, it looks like almost all
> (if not all) the "I/O error on connection" entries have a corresponding
> "collect: premature EOM: Connection reset by <foo>" entry.
> Why would the remote server reset the connection?

I'm not sure, but I seem to have ran into the same problem (sort of) 
recently. We, both ends, sort of figured out it was a combination of my 
timeout settings and his greylist settings. For some reason, the connection 
was almost always broken during the DATA phase, which didn't make sense, but 
my end thought that it was bad enough to resend, over and over to his end, 
which never changed the greylist entry to a whitelist (accept) entry. I 
don't recall see similar messages in my logs, though. But this could be one 
of the causes.

Steve Campbell
campbell at cnpapers.com
Charleston Newspapers

> Is there anyway I can manually test if this is an ICMP issue?
> Thanks,
> Chris.
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