I deleted an email by mistake a few days ago. I was wondering if there is a way to recover it.

Email to cs.arizona.edu addresses for current CS students, faculty, and staff is redirected to email.arizona.edu mailboxes. Your INBOX and other folders, such as Trash and Sent, are stored on the email.arizona.edu server. You may have other mail folders on that server and some in your home directory. For mail on the email.arizona.edu server, you may request a full mailbox restore. Note that this might overwrite current mail, so be careful when choosing this option. See http://ccit.web.arizona.edu/index.php?id=657#c6258.

You may also have email folders within your CS home directory. These are backed up via the normal backup mechanisms used for all CS accounts and can be recovered via the snapshot feature.  Note: if you don't want your email backed up, don't store it in your home directory.