Campus Technology Services supports and recommends the IMAP protocol, for security reasons.

Here are the basic differences between IMAP and POP protocols:

IMAP (Internet Message Access Protocol) is a standard protocol for accessing e-mail from the remote mail server (Rocky).  With IMAP, you can view just the heading and the sender of the letter and then decide whether to download the mail. You can also create and manipulate folders or mailboxes on the server, delete messages, or search for certain parts or an entire note.
 
POP (Post Office Protocol) is less sophisticated than IMAP. As with IMAP, POP protocol stores mail on Rocky, but your POP e-mail client downloads the messages to your computer's hard drive. Once this is done, POP erases the mail from the mail server. This means you will only be able to retreive those messages when working on that specific computer you downloaded the email to-- a disadvantage, when compared to the “universal access” that IMAP servers provide.