I can receive e-mail, but I can't send it! Why?

1. Are you off campus?

There are two common problems that would cause your e-mail to stop working when you left campus. This first of these is that many ISPs (including Pomona) block outbound mail that does not going through their own e-mail server. (This is an attempt to block spammers.) The second problem is not configuring your e-mail client to authenticate when sending e-mails. In both these cases you would be able to send e-mail when you are on-campus, but once you leave campus you would not be able to send any.

The easiest way to solve both of these problems is to ensure your mail client is configured properly. For instructions on doing this, please check the setup instructions for your specific mail client.

If this doesn't work, you should still be able to send mail from webmail or squirrelmail.

2. Are you over quota?

Have you been receiving annoying storage notice e-mails recently? If so, your ability to send mail has probably been temporarily removed. Check out these tips for cleaning out your inbox and getting back under quota.

3. Are you using McAfee Enterprise Edition? (Windows users only)

By default, the newest version of McAfee blocks all outgoing mail. If you see a small blue shield with a red V in the middle on your system tray, then you're using Enterprise Edition.

In order to turn off outgoing mail blocking:

1. Right-click on the shield icon and select VirusScan Console...
2. Double-click the Access Protection icon
3. Under Port Blocking tab, uncheck the entry that blocks port 25 (it claims to stop worm e-mail spam).

You may have to restart your computer for these changes to take effect.