said by Oedipus:
Not quite sure what you do in "remote IT" () that requires port 25, but as soon as you tell Comcast that they will come right back and either say a.) tough cookies, or b.) get a business class connection.
That blog post says "Upon request to our Customer Security Assurance team this block can be removed, enabling access to use port 25 for other email domains"
I need port 25 open to test to make sure the mail servers will accept a connection on it via telnet. If all servers blocked port 25 email would cease to function.