WinBiff features:

• Filters to ignore or delete spam, using regular expressions and character sets
• Automatic dialup and hangup of a network connection
• Scrollable list of email headers, showing attachments
• Option to disregard already-read mail
• Stay on top option
• Visual indication of polling
• Decoding of MIME headers for the display of accented characters
• Mail reader can be automatically launched on new mail or by clicking on WinBiff
• WAVBase plays distinct sounds based on the sender or subject of messages, using regular expression matching
• Optional repeating alarm
• Customizable colors
• Can run multiple instances to monitor different mailboxes