tumgreyspf

External policy checker for the postfix mail server

Tumgreyspf, an external policy checker for the postfix mail server. It can optionally greylist and/or use spfquery to check SPF records to determine if email should be accepted by your server. Because of its design, legitimate e-mail is never trapped or rejected. Only spam and viruses are caught. Since adding it to our mail server (which also uses Spam Assassin, ClamAV, and an outsourced anti-spam system), our spam level has dropped by an order of magnitude. It uses the file-system as its database, no additional database is required to use it.