Scott Wood sent out an email about this change to the mail server on 6/2:
Due to a number of virus infected messages directed to Drew's internal mail server (email.drew.edu), we have made an access change to our e-mail server in order prevent further infected messages from being received. We are now blocking the ability to send mail through Drew's internal e-mail server on the standard port 25. For most people, this change will not be noticed as many internet service providers already block this access. However, if you are receiving error messages when you send e-mail, you need to make a simple configuration change to your e-mail client. The e-mail client that Drew supports is Mozilla Mail and the steps required to make this change are:
Open Mozilla Mail
Click on Edit -> Mail & Newsgroup Account Settings
Click on Outgoing Server (SMTP) [found directly above the Add Account button]
Change Port from 25 to 2525
Click on OK
Many of you will have already made this change because most internet service providers block access to port 25 except to access their own mail servers.
Please note that this change does not under any circumstance affect the ability to send e-mail through Webaccess (http://webaccess.drew.edu
If you need assistance changing these settings for Mozilla Mail, please contact the CNS Helpdesk at x3205 (973-408-3205).