Spamphibian

Spamphibian turns any Macintosh OS X computer into a reliable and efficient SMTP proxy that protects your company or organization from unwanted spam, viruses, phishing scams, and more. The OS X native Spamphibian Admin application allows you to remotely administer and maintain Spamphibian Gateway, as well as manage the messages that have been quarantined. The simple configuration procedure will have you stopping unwanted emails in minutes.

Requirements:

OSX 10.3 or better

Limitations:

30-day trial