查看Procmail的源代码

rocmail can be used to create mail-servers, mailing lists, sort your incoming mail into separate folders/files (real convenient when subscribing to one or more mailing lists or for prioritising your mail), preprocess your mail, start any programs upon mail arrival (e.g. to generate different chimes on your workstation for different types of mail) or selectively forward certain incoming mail automatically to someone.

http://www.procmail.org/

SmartList is built on top of procmail and provides for the simple creation and handling of mailing lists, including fully automated subscription/unsubscription/help-request processing, intelligent autoremoval of addresses from the list that cause too many bounces, a built in archive server (with MIME support), and just about all the other mailing list features you can think of.

http://www.procmail.org/