So Comcast announced over the weekend that they would start blocking Port 25 (the SMTP port) for suspected spammers (see the following article: http://www.washingtonpost.com/wp-dyn/articles/A35541-2004Jun11.html ). I spent about two hours on and off trying to get mail.app working with Bellsouth before I finally found from extensive searching of their support site that they block port 25 for ALL users. How common is this? Do a lot of others have ISPs who don't allow access to SMTP from someone other than themselves? To give Bellsouth some credit, you can send using any e-mail address you want, @bellsouth.net or not, using their SMTP, but this is the sorta thing they should more visibly state. I spent a lot of time going through my firewall settings, my AEBS settings, my Linksys router settings, my DSL modem settings, trying to figure out what was blocking the port... Dunno if I'm asking a stupid question, but from this article (http://p2pnet.net/story/1671) it doesn't sound like ISPs blocking SMTP for all users indiscriminately is very common. It certainly wasn't anything I'd heard of in Michigan, although it's been a while since I used non-web-mail at home.