Port 587 vs. 25 [was: DNS Hijacking by Cox]

Mon Jul 23 09:14:45 UTC 2007

On Mon, 23 Jul 2007, Patrick W. Gilmore wrote:

> They can, but they do not.  AFAIK, not a single ISP redirects port 587 to 
> their own servers.

I work for an ISP that has totally blocked TCP/25 for all use. We require 
all users to use 587 (with authentication when connecting to our own mail 
system). We have substantially over 1M broadband users in 10-15 european 
countries (I don't know the exact number).

This took planning, lots of information and HOWTOs to users, and some 
helpdesk backing to get into place, but it's done, and it works. It was 
less painful that we dreaded.

Unfortunately we don't have internet operations in native english speaking 
country, so this will be in whatever it might autodetect your language to.

http://www.tele2mail.com/

As you can see, there are configuration manuals for all major email 
clients, for instance outlook:

http://www.tele2mail.com/manual/outlook/

So my recommendation is for other ISPs to do the same thing. Yes, I know 
IP providers should only move IP packets and don't care about the 
contents, but... well... you know.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se