An email filter rules manager

 Ingo is an email-filter management application. It is fully internationalized,
 integrated with Horde and the IMP Webmail client, and supports both
 server-side (Sieve, Procmail, Maildrop) and client-side (IMAP) message
 filtering.
 .
 This package is part of Horde, a web application Framework written in PHP with
 modules like IMP (webmail), Turba (contacts), Kronolith (calendar), Nag (task
 list), Gollem (file manager), etc.