[ydl-gen] Re: Setting up sendmail to send mail (via SMTP)

[Christopher Murtagh]

On 8/17/06, pstreibig <pstreibig at bcj.com> wrote:
> I'm curious though, when you say your ISP blocks all outbound mail.  How
> are they implementing this?  I guess it's more academic curiosity, but
> did you try changing the default port for sendmail?

My ISP (Videotron) blocks all outbound port 25 connections that aren't
going to their SMTP relays. This is an easy (if not draconian) way to
solve huge zombie and spam-bot problems on their network. It also
makes it easier for them to prevent abusers and throttle, monitor all
mail sent from their network and to spy on me. Judging by what Eric
was describing, it looks like Bell is doing the same thing. If Bell is
simply filtering port 25 by dropping packets (as what Videotron does),
he would see the connection timeouts that he's describing.

Cheers,

Chris