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Sieve Out of Office
Set out of the office messages and redirect emails with this add-on for Thunderbird...
Web Filtering Toolbar
A Firefox toolbar to filter webpages....
Packet filtering setup script
Packet filtering setup script by Anthony C. Zboralski....
WebFilter Pro - The web content filtering addon!
The best web content filtering add-on for Mozilla Firefox...
SmartSieve
SmartSieve is a web-based managesieve client and sieve filtering GUI....
GUI mail filter filtering managesieve client sieve filtering