On Wed, Dec 29, 2010 at 09:11:41PM +0100, Patrick Ben Koetter wrote:
> > Perhaps we can encourage better hygiene, by not offering AUTH in
> > postscreen. People who want AUTH and postscreen, can migrate their AUTH
> > users to port 587? Or is this still too much to ask of potential Postfix
> > users?
>
> I guess it is.
>
> The problem is you need to persuade admins that they trade a short period of
> pain - aka switch AUTH from 25 to 587 - in for less pain in the long run (more
> selective policies, less spam).
In the MTA to MTA space, internally, we offer AUTH on 587 between
null-client MTAs and the mailhub. Port 25 is for MX-using MTAs which
have stable IPs and are whitelisted for direct access.
The problem is very likely just ISP MUAs. Which ISPs still make money on
emai users? It seems that Gmail and the other 800lb free-email gorillas
have largely taken over the consumer email market. Is there in fact
a business incentive to offer users submission services on any port
(25 or 587)?
--
Viktor.
