From: Ralph Utbult (no email)
Date: Wed Dec 01 2004 - 10:40:20 EST
> Ämne: Re: SV: Problem with attachment in Outlook and Express
>
> On Wed, Dec 01, 2004 at 03:53:27PM +0100, Ralph Utbult wrote:
>
> > This is interesting! It seems that when mail is bigger than
> 10 kB, OE takes a very long time to send it.
> > I see a lot of 354 End data with <CR><LF> in the log file.
> >
>
> Do you have verbose logging on? How verbose? Why? Turn the
> verbose logging off, and make sure that syslog logs mail
> messages without fsync() after every write (-/var/log/maillog).
>
> If large messages are delayed, either your network is broken,
> say PMTU by a firewall you don't know is there, or just a
> high packet loss rate for large packets, one possibility is a
> duplex mismatch between the switch and a host network card.
> This would cause the switch to stop sending data when the
> Postfix server returns an ACK that overlaps a data segment
> (Postfix full-duplex, switch half-duplex).
This is unbelivable! For some reason, I had the mail server hooked up to a Netgear 24-port dual-speed hub. This, in turn, hookes up with the internal, wall-drawn, network. Switched cables, so the server hookes directly to the wall outlet - and Voilá - it all works!. I just wonder - why?
Thanks all for your input - some of it will come in handy for tuning!
Regards,
Ralph Utbult
|
|
|