AT&T will provide support for sending E-mail using AT&T owned and operated outgoing server addresses:
- Former AT&T Wireless customers use "smtp.mymmode.com" (Standard POP/IMAP compatible via port 25 with no SSL.)
- AT&T customers use "cwmx.com" (Standard POP/IMAP compatible via port 25 with no SSL.)
The configuration and use of any other outgoing server address will not be supported due to several factors including, but not limited to, the inability for the outgoing server to authenticate users (whether by IP or username/password) that are not directly connected to that Internet Service Providers network. This is mainly done to prevent unsolicited users from sending SPAM via the ISPs servers.