This measure only prevents non-iComm users from sending spam through our server. This helps to reduce spam for everyone, and ensures that iComm's server won't be abused. Users of an abused server usually lose service afterward, so if nothing else, this helps to keep iComm's system fast and stable. You can run a simple test. Using your normal mail setup, just send mail to a non-iComm account.
Most clients show status messages while they're handling mail.
Watch the messages to see if it checks for new mail before sending the message. If it does, you're covered. In all cases, the client must check for new mail before attempting to send mail. Our setup has been successfully tested with recent versions of Eudora, Pegasus Mail, Netscape Mail. This change doesn't affect you if you use Pine, Elm, Mutt, or mailx locally on iComm because local users are already authenticated.