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.