| Philter is an Anti-Spam program that works by sitting between your email client and your ISP's mail server. It can be run in the background on your own computer, or you could place it on a dedicated server machine, in effect creating your own POP3 server. Philter is essentially half-POP3 client, half-POP3 server, and filters out unauthorised mail using a whitelist.
The whitelist is built automatically using a challenge-response system, whereupon the first time a sender contacts you, they are simply asked to confirm their email address by replying to an automated message. Once the system receives the confirmation, their address is whitelisted for a set period (usually several months) so future mail from them is allowed through hassle-free. Whilst a sender's address is pending verification, mail from them is placed in a 'quarantine' list.
Philter supports importing/exporting of contacts in CSV format, so you don't have to build your whitelist from scratch, or annoy existing contacts. We're hoping to release the product very soon for public beta testing.
Download for testing today!
Read more in our Development Diary
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