[BlueOnyx:09144] Re: Smtp errors

[Hugo Sesma]

Jeff,

I suspect that is the remote server, but I don't know how to check it, I
can talk to the administrator of  the domain/server, can you lead me what
to search. I'm sure, I'm not blocking it.

Regards

H.


On Mon, Nov 28, 2011 at 3:06 PM, Jeff Folk <jfolk at qzoneinc.com> wrote:

> On Nov 28, 2011, at 2:33 PM, Hugo Sesma wrote:
> >
> > Hi,
> >
> > One of our coustumers can't recive mail from a specific domain.
> Searching in the mail log I've found this log entries.
> >
> > Nov 25 09:05:40 ns1 sendmail[32559]: pAPF06Sd032559: SYSERR(root):
> collect: I/O error on connection from smtp.mm.xxxx.com, from=<
> user at mm.xxxx.com
> > >
> > Nov 25 09:05:40 ns1 sendmail[32559]: pAPF06Sd032559: from=<
> > user at mm.xxxx.com>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA,
> relay=smtp.mm.xxxx.com
> >  [187.174.140.198]
> > Nov 25 09:21:24 ns1 sendmail[1241]: pAPFE1Uc001241: collect: premature
> EOM: Connection reset by
> > smtp.mm.xxxx.com
> > After this I've made some research in the web and find there was 2
> options configuration error in sendmail.mc specific for version 8.7 or
> blacklist servers not responding.
> >
> > I don't feel conformtable messing with sendmail configuration files.
> >
> > So any sugestions will be apperciated.
> >
> > May be a clue to all this could be a very slow delivery time and trouble
> with large atachments >2 Mb.
> >
> > thanks in advance.
> >
> > H.
>
> Are you (or the sending server) blocking ICMP? MTU discovery uses ICMP to
> negotiate MTU.
>
> Regards;
> Jeff
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