Greylisting Software

Aloaha by Aloaha

Innovative server based AntiSPAM Solution. Incl. SPF Support! Does not depend on IIS or Exchange. Works together with every SMTP Server. Does not accept spam. Rejects spam before reaching the SMTP server.

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Merak Email Server Suite by IceWarp Ltd.

Multiple awards winner mail server with ultimate features and stability. Provides you with secured Mail services, Web-Mail, Anti-Spam, Anti-Virus, Instant Messaging, GroupWare, FTP, ODBC and load balancing, monitoring and report facilities.

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SMC anti-spam filter for Sendmail by True Audio Software

SMC anti-spam milter is an Sendmail plugin, that is designed to significantly reduce the amount of junk email you receive. It uses an original algorithm "Check delays", also known as "Greylisting".

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