JEP(S) Greylist

From Proxmea:

JEP(S) is the first line of spam protection for your Exchange 2000/2003/2007/2010 and IIS SMTP servers. With JEP(S) you stop up to 98% of the spam before it even hits your mail system. By offloading the mail system JEP(S) not only increases the available CPU power for critical tasks, but also moves the security perimeter one step outwards. With a modular approach JEP(S) supports single server installations as well as multi server installations in corporate high availability environments. JEP(S) utilizes greylisting, RBL's, RWL's, static black and white lists, address filtering, admin e-mail, automatic real time blacklist submission and real time statistical graphs. In addition, JEP(S) provides localization in English, French, German, Russian, Italian, Spanish, Portuguese, Swedish, and traditional Chinese.