nanog mailing list archives
Re: Port 587 vs. 25 [was: DNS Hijacking by Cox]
From: Mikael Abrahamsson <swmike () swm pp se>
Date: Mon, 23 Jul 2007 11:14:45 +0200 (CEST)
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 () swm pp se
Current thread:
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking, (continued)
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking Valdis . Kletnieks (Jul 23)
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking Chris L. Morrow (Jul 23)
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking by Cox) Suresh Ramasubramanian (Jul 23)
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking by Cox) Sean Donelan (Jul 23)
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking by Cox) Suresh Ramasubramanian (Jul 23)
- RE: How should ISPs notify customers about Bots (Was Re: DNS Hijacking by Cox) michael.dillon (Jul 23)
- RE: How should ISPs notify customers about Bots (Was Re: DNS Hijacking by Cox) Chris L. Morrow (Jul 23)
- Re: How should ISPs notify customers about Bots (Was Re: DNS Hijacking Joe Greco (Jul 23)
- Re: DNS Hijacking by Cox Florian Weimer (Jul 22)
- Port 587 vs. 25 [was: DNS Hijacking by Cox] Patrick W. Gilmore (Jul 23)
- Re: Port 587 vs. 25 [was: DNS Hijacking by Cox] Mikael Abrahamsson (Jul 23)
- Re: Port 587 vs. 25 [was: DNS Hijacking by Cox] Jeroen Wunnink (Jul 23)
- Re: Port 587 vs. 25 [was: DNS Hijacking by Cox] Mikael Abrahamsson (Jul 23)
- Re: Port 587 vs. 25 [was: DNS Hijacking by Cox] Jeroen Wunnink (Jul 23)
- Re: Port 587 vs. 25 Florian Weimer (Jul 23)
- Re: DNS Hijacking by Cox Niels Bakker (Jul 22)
- Re: DNS Hijacking by Cox David Conrad (Jul 23)
- Re: DNS Hijacking by Cox Joe Greco (Jul 23)
- Re: DNS Hijacking by Cox Sean Donelan (Jul 23)
- Re: DNS Hijacking by Cox Joe Greco (Jul 23)