I suppose, the ADSL provider uses a HTTP Proxy to filter the traffic and if you
connect the HTTP Proxy with SMTP protocol you take the HTTP Error 550, because the
Proxy can not handle SMTP protocol.
--Angel
---------- Original Message ----------------------------------
From: "Daniel Perry" <[EMAIL PROTECTED]>
Reply-To: "James Users List" <[EMAIL PROTECTED]>
Date: Wed, 14 Jul 2004 11:44:14 +0100
>I've got a bit of a wierd problem at the moment with a clients email
>account.
>
>A client needs to use their notebook from their home adsl connection (pipex)
>and through a free dial up (wanadoo) while abroad (via a mobile).
>
>Anyway, their dialup doesnt provide smtp relay, and also block connections
>to ports other than 80 and 443. So i've set up NAT in iptables to forward
>443 to 25. All is working from my end, and it works over the dialup. But
>through ADSL my client is getting "550 Administrative Prohibition" errors.
>
>I'm cant get at their computer for the time being, so i cant check exactly
>what is happening, just wondering if anyone has any ideas?
>
>To be honest, i'm not convinced he's using our server atall as his
>connections arnt showing up in the smtp logs.
>
>Daniel.
>
>
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