I'm trying to set up a home network with an email server as well.
Lynksys Wireless 300N gateway router.
Winserv 2008 smtp enabled, firewall diabled
No Exchange installed yet
Comcast blocks port 25 and they use port 465 for incoming and 995 for outgoing. In the router, on the single port forwarding page, I set "External Port" to 995 and "Internal Port" to 465, and then set it to forward to my winserver 2008 with smtp enabled (no Exchange server installed). I use canuseeme.org to see if the outside world can see the opened ports. It can see port 80, which I also opened up, but I cannot see port 25, 465, or 995
Anybody have any experience setting up an email server when you have a comcast isp? I don't even need incoming mail, I have a Sharepoint site using port 80 and All I want is to be able to send email alerts to addresses outside of my network.