Chuck,
Typically, it is the MTU of the first 'router' or the sending computer, that
is the trouble. I'm not an expert on fixing this, by any stretch of the
imagination (actually did that part, only once, on one PC!), but I have seen
this enough times, to recognize the symptoms ('unreliable' connections,
especially with larger amounts of data). And that dialup/modem connections
are almost always the ones with this problem. That is how I guessed it was a
dialup connection!
Sorry I cannot help in more detail. Maybe you can tell us what you find?
Daniel Donnelly
________________________________________________________
----- Original Message -----
From: "Chuck Schick" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, June 19, 2001 4:22 PM
Subject: Re: [IMail Forum] Strange SMTP problem.
> Daniel:
>
> Thanks for the response. The client is using a dual-channel ISDN
connection
> (dialup). It is not a new connection but the problem just started.
>
> When you say that it may be a MTU problem, what do you mean? Should we
look
> at the MTU setting on the individual machines? I will check the spool
> directory.
>
> Chuck Schick
> Warp 8, Inc.
> www.warp8.com
> 303-421-5140
>
> ----- Original Message -----
> From: "Daniel Donnelly" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, June 19, 2001 2:07 PM
> Subject: Re: [IMail Forum] Strange SMTP problem.
>
>
> : Chuck,
> :
> : First look makes me think there is a network problem with that customer.
> : Since the log shows good, up to the RCPT To: line, then the rest of the
> : transaction between IMail and the client is missing, seems to indicate
the
> : client end disconnected or transmission of data has gotten messed up.
That
> : is works sometimes, also is not inconsistent with network problems. And
if
> : it is a MTU problem (as I suspect), the larger the amount of data, the
> more
> : likely the problem will occur (and the more likely small messages will
be
> : successful). Is this a new connection for the customer? Is it a dialup
or
> : cable modem connection? Those are the most likely to have problems (in
my
> : experience).
> :
> : Do you see any TO*.* files in the \spool dir, when this is happening?
That
> : would indicate that IMail has accepted a connection and is waiting for
the
> : SMTP transaction to complete. That file would eventually become the Q
and
> D
> : files needed for IMail to process the message. Normally, T files exist
for
> : only very short times or if you restarted the system during a SMTP
> : transaction.
> :
> : Daniel Donnelly
> : ________________________________________________________
>
>
>
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