Gerard Bok wrote:
>
> I also got word from the ISP involved: they did not raise the
> number of simultaneous connections on that mail account.
> But that shouldn't matter as XP Home is not able to make more
> than 5 connections anyway, I think.
> And problems also occur when there's only one single user active.
>
HI.

You are wrong.

The connection limit in Windows XP (both Home and Pro versions) with SP2,
refers to embryonic or half-open connections when the XP clients sends the first packet of the TCP handshake,
and is waiting for the first response from the server (or whatever device in the other side).

If the TCPIP stack on the XP computer reaches that limit, you will find a yellow Event ID 4226 that tells you.
So, if you don't see Event 4226, then this is not the issue.

You can read more info about this limit and workaround here:
SpeedGuide.net :: Windows XP SP2:
http://www.speedguide.net/read_articles.php?id=1497

Yizhar Hurwitz
http://yizhar.mvps.org