broken_keyboard said:
That is often caused by your ISP blocking port 25. You should contact them and see if they are.
Unless by "can't connect to my email" he meant "The Sendmail/Postfix server I'm running on my own machine isn't being allowed to send mail", this isn't likely to be the problem. The port 25 blocking problem should only affect people who are running their own SMTP servers - and very few folks are (and those folks who are running one certainly know it).
Regular email will be going over ports 110/995 (POP3), or 143/993 (IMAP).
misguided, can you provide specific details on exactly what you meant? What program you're using, etc.?