Re: Re: Internet Problems (was KAT 5)

["Campbell" <c.macd@xxxxxxx>]

It may or may not be connected... but I have had serious connection
problems
with bt anytime, including mail servers working one second, not working the
next. Dial up connections have been dropped after 30 secs continously for
the last 1.5 weeks. It was also partially noticeable on Freenetname who are
normally very good.

Today (Sunday) I have no problems (yet). So the hard disk clean may not be
necessary.


Campbell
----- Original Message -----
From: "K. C. Li" <li@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Sunday, May 20, 2001 1:00 PM
Subject: RE: [ukha_d] Re: Internet Problems (was KAT 5)


> On Sun, 20 May 2001, Keith Doxey wrote:
>
> > I dont believe all the problems were due to BTInternet because I
tried
> > different dialups using Freeserve and Freenetname and there were
> > connectivity failures there too. I think something on the main
Internet
> > backbones has been severly knackered, or there is just too much
traffic
for
> > the current infrastructure. Some sites were perfectly reachable,
> > others....not a hope.
>
> As we run our own e-mail server and not via another ISP, we can see
where
> the problems are in terms of e-mail delivery. BT Internet is by far
the
> worst so far. From our logs, it appears that BTI have two e-mail
servers,
> "stargate" and "moongate", that handle their
e-mails. A lot of the time,
> either one or both of them would refuse to accept e-mails for hours.
This
> is not a connectivity problem as our e-mail server was able to
communicate
> with them but just received connection refused responses.
>
> This connection refusal is sometimes the cause of e-mails arriving out
of
> sequence. The reason is that some e-mail servers (eg. postfix) have
> intelligence built-in to minimise e-mail delays and to protect the
> destination servers from undue overload. If an e-mail cannot be
delivered
> to the destination, it is queued for an increasing waiting period
before
> retry. This is designed to minimise overloading the destination server
> when it comes back on line (and cause it to overload again). While the
> e-mail is being queued, attempts to deliver any new e-mail to the same
> destination would continue and may succeed if the refusal is sporadic.
So
> it is possible for new e-mails to arrive before the old ones that are
> still waiting in a queue.
>
> Regards,
>
> Kwong Li
> li@xxxxxxx
> Laser Business Systems Ltd.
> http://www.laser.com
>
>
>
>
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