port 25 blocked by your ISP & exchange 2003
as many people are aware, many ISPs block traffic on port 25 in order to attempt to prevent spammers from using bot infected hosts on their networks. this can be a problem for people who want to run a mail server from their home connection. yes, i realize that running an email server violates the TOS of most providers but that is a discussion for another day. i personally use my email server as a learning experience but i also use it for my primary personal email....