North American Network Operators Group

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Re: SMTP authentication for broadband providers

  • From: Sean Donelan
  • Date: Wed Feb 11 15:16:00 2004

On Wed, 11 Feb 2004 [email protected] wrote:
> On Wed, 11 Feb 2004 11:15:20 PST, Dave Crocker said:
> > what about port 25 blocking that is now done by many access providers?
> > this makes it impossible for mobile users, coming from those providers,
> > to access your server and do the auth.
> Port 587.

So is it time for ISPs to start blocking port 587 too?

If the complaints are going back to the IP address anwyay, why shouldn't
an ISP force it subscribers to go through the ISPs mail servers so it can
control any messages sent by its subscribers?