It periodically checks one or multiple email accounts (POP3, IMAP, POP3/IMAP-SSL, MAPI, Hotmail.com, MSN.com) and notifies you when new mail arrives (by playing a sound, showing a notification window).

You can preview and even delete mail without actually downloading it into your mailprogram.

Additionally MailBell offers functions to preview mail and to manually or automatically delete mail based on a list of kill-words or senders.

This allows blocking of unwanted mail and deletion of mail with large attachments without actually downloading these mail into the mail program.