STS - SupportTicketsystem and Knowledgebase - auto response, Mail - parsing , mysql or mssql, user can rate tickets which where published in the knowledgebase for professional use user groups, admin - groups, ticketstatus - support iv'e read message
Enterprise Collabortion Suite 2004. ECS2004 is a Web Mail, Shared Calendar, Projects, Helpdesk, Survey Engine, File Manager, Contacts, Forums and IM suite. Easy to use and a very low user learning curve. Professional look and feel. Easy installation.
IMAP-Agent is an automated IMAP mail folder management system implementing site wide and
individual user specific rules for filtering mail between folders.
Also, quotas can be maintained by age or max count of
messages for any folder.