Hermes is a generic, transparent, multi-platform anti-spam SMTP proxy that uses a combination of techniques (like greylisting, throttling, RBL, etc.) to stop spam from reaching your mailbox. It's compatible with most SMTP extensions like STARTTLS (for SSL security) and SMTP-AUTH (for user authentication).
Licence : GPL
Version : 1.3 [Stable]
Release Notes : With this release the focus has been on the Windows version, with many fixes to resolving, logging, etc. On the Unix front, hermes will now add some RFC-required headers that were missing before.
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