Binary package “maildrop” in ubuntu hardy

mail delivery agent with filtering abilities

 maildrop is a mail delivery agent (MDA), a program which reads a mail
 message from standard input and then delivers the message to your mailbox.
 maildrop knows how to deliver mail both in mbox and maildir storing
 formats. It can read instructions from a file, directing it how to filter
 incoming mail, for example to deliver mail to alternate mailboxes,
 or forward it to somewhere else.
 It performs all the same functions as procmail, but unlike procmail,
 maildrop uses a structured filtering language which is a bit easier
 on the eyes. Other differences from procmail include not skipping syntax
 errors in filter files (instead deferring the mails for later processing)
 and being more resource-efficient when processing mails (not loading
 large messages right into memory).