North American Network Operators Group

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Re: Why do so few mail providers support Port 587?

  • From: Florian Weimer
  • Date: Sat Feb 19 08:20:16 2005

* Sean Donelan:

> Yet another reason for supporting port 587 on your servers for remote
> authenticated mail submission from your users.  If you don't support
> port 587, and use SPF, it may break when AOL or other providers re-direct
> port 25.
>
> http://www.heise.de/english/newsticker/news/56437

Has AOL notified anyone in advance?  Quite a few provider-independent
mail providers were caught by surprise.