On Mar 1, 2015, at 14:01 , John R. Levine <johnl@iecc.com> wrote:
Well, actually, it does. Every broadband network in the US currently blocks outgoing port 25 connections from retail customers.
Unfortunately, that's not entirely true. (Very) recent direct-to-MX spam from Comcast customers:
Well, it's supposed to be blocked, according to people I've talked to at Comcast and T-W as recently as a week ago. I can believe that they have configuration problems on a networks of that size.
fairly certain that none of these folk block port 25 on their business customer links.
As I said above, retail customers. Business customers get static IPs and generaly no blocking.
R's, John
Business customers only get static from Comcast if they pay extra for it. Owen