1 A while back I [[posted about Comcast blocking outgoing traffic on
2 port 25|Comcast_rediculousness]]. We've spent some time with
3 Verizon's DSL service, but after our recent move we're back with
4 Comcast. Luckily, Comcast now explicitly lists [the ports they
5 block][block]. Nothing I care about, except for port 25 (incoming and
6 outgoing). For incoming mail, I use [Dyn][] to forward mail to [[port
7 587|Postfix]]. For outgoing mail, I had been using [[stunnel]]
8 through `outgoing.verizon.net` for my [[SMTP]] connections. Comcast
9 takes a [similar approach][comcast] forcing outgoing mail through port
10 465 on `smtp.comcast.net`.
12 [block]: http://customer.comcast.com/help-and-support/internet/list-of-blocked-ports/
13 [Dyn]: http://dyn.com/
14 [comcast]: http://customer.comcast.com/help-and-support/internet/email-client-programs-with-xfinity-email/