mail.com has recently started using AOL's servers. Accounts that have been upgraded to this new service can be accessed using the IMAP/SMTP protocols. Accounts that have not been updated can still use the "mail.com" server type in POP Peeper. The IMAP/SMTP settings are as follows:

Incoming Mail Settings:
Login Name: Full email address (e.g. jsmith@mail.com)
Server Type: IMAP
Server: imap.aol.com
No SSL (SSL is optional)
Port: 143 (if using SSL: 993)
Idle: optional

Send Mail Settings:
Reply Option: SMTP
Server: smtp.aol.com
No SSL (SSL is optional)
Port: 25 or 587 (if using SSL: 465)
Server Requires Authentication: Enabled