On Thursday 10 February 2005 10:30, Niels Voll wrote:
> Hi Curtis,
>
> Thanks for the explanations (and underlying research). Now it makes more
> sense. And that's a very interesting tidbit: An ISP grabbing all port 25
> traffic and running it through their smtp servers. Or might your Dad
> have an smtp proxy on his machine, which he might have unknowingly
> installed as part of some "wireless setup" where he is staying? I just
> hadn't heard of a port grab like that before. i.e. So far I've only

Yes, indeed interesting as he wasn't running any sort of SMTP proxy prior (I 
set it up for him) and when they arrived he simply booted up and away he 
went.

> heard about ISP's blocking (like Telus blocking outbound port 25). But I
> know that some client based antivirus and antispam tools intercept smtp
> and/or pop3 ports. So that's why I was wondering is it possible, that
> the port grab actually might be happening on his own machine?

I too have seen that behavior, but in this case, no additional software has 
been installed and no proxy existed prior.

Curtis

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