Ed Marczak responded to this earlier, but everyone (of course) is invited
to help...
At 11:11 AM 7/8/02 -0400, you wrote:
>On 7/7/02 1:10 PM, "Ben Ocean" [EMAIL PROTECTED] pressed the keys forming
>the message:
>
> > At 10:05 AM 7/7/02 -0400, you wrote:
> >> On 7/6/02 12:42 PM, "Ben Ocean" <[EMAIL PROTECTED]> wrote:
> >>
> >>> Hi;
> >>> Mail messages apparently are being timed out on some messages being
> >>> delivered to my server. Here's a transcript:
> >>>
> >>>> Thu 2002-07-04 14:09:56: [-1:15] > Parsing Message
> >>>> <C:\MDAEMON\REMOTEQ\RETRY\pd90000000001.msg>
> >>>> Thu 2002-07-04 14:09:56: [-1:15] > From: [EMAIL PROTECTED]
> >>>> Thu 2002-07-04 14:09:56: [-1:15] > To: [EMAIL PROTECTED]
> >>>> Thu 2002-07-04 14:09:56: [-1:15] > Subject: tgiw
> >>>> Thu 2002-07-04 14:09:56: [-1:15] > Message-ID:
> >>>> <000701c222ce$5546b5e0$[EMAIL PROTECTED]>
> >>>> Thu 2002-07-04 14:09:56: [-1:15] MX-record resolution of
> >>>> [dahlelectric.com] in
> >>>> progress (DNS Server: 206.40.133.20)...
> >>>> Thu 2002-07-04 14:09:56: [-1:15] P=010 D=dahlelectric.com TTL=(1147)
> >>>> MX=[mail.dahlelectric.com] {216.57.201.7}
> >>>> Thu 2002-07-04 14:09:56: [-1:15] Attempting MX: P=010 D=dahlelectric.com
> >>>> TTL=(1147) MX=[mail.dahlelectric.com] {216.57.201.7}
> >>>> Thu 2002-07-04 14:09:56: [-1:15] Attempting SMTP connection to
> >>>> [216.57.201.7 :
> >>>> 25]
> >>>> Thu 2002-07-04 14:09:56: [25:15] Waiting for socket connection...
> >>>> Thu 2002-07-04 14:09:57: [25:15] Socket connection established
> >>>> Thu 2002-07-04 14:09:57: [25:15] Waiting for protocol initiation...
> >>>> Thu 2002-07-04 14:10:28: [25:15] 30 second wait for protocol timeout
> >>>> exceeded.
> >>>> Thu 2002-07-04 14:10:28: [25:15] This message is 1 days old; it has
> 4 days
> >>>> left to
> >>>> get delivered
> >>>> Thu 2002-07-04 14:10:28: [25:15] SMTP session abnormally terminated, 0
> >> bytes
> >>>> transferred.
> >>>
> >>> How do I begin trouble-shooting this one? The MTA is qmail.
> >>
> >> Not that I know anything about qmail....but is this incoming or outgoing?
> >> Are you quantumci.com or dahlelectric.com?
> >
> > Oops. I'm dahlelectric.com
>
>The log you present above does not appear to be from dahlelectric.com. At
>least not from the mail server. That would be a good place to start. What
>this log shows me is this:
>
>- Mail is being sent from point A to dahlelectric.com
>
>- qmail goes through MX resolution to determine where to send mail for
>dahlelectric.com. Turns out to be mail.dahlelectric.com @ 216.57.201.7
>(which is actually www.performancemarketers.com, also running qmail)
>
>- It makes an initial connection, but then times out.
>
>- With delivery being unsuccessful, the message is queued for re-delivery
>later.
>
>Now, that timeout. There are many reasons for that. I just helped a client
>with a similar problem. Some remote users could check IMAP mail, some
>couldn't. Like you, they made an initial connection and then....nothing.
>
>Turned out that the problem sites were using older hardware (xDSL routers)
>that weren't properly dealing with PMTUD. Some sites were able to upgrade
>their firmware, solving their problems. I wound up lowering the MTU at the
>host site slightly for people who couldn't upgrade.
Okay, let's assume that's what's going on (since I set my qmail for very
verbose error-checking and couldn't even discover that the sender in
question was even hitting my server). How do I *lower the MTU*?
TIA,
BenO
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