Postgrey Alternatives
Postgrey
Postgrey is a Postfix policy server implementing greylisting developed by David Schweikert.
When a request for delivery of a mail is received by Postfix via SMTP, the triplet CLIENT_IP / SENDER / RECIPIENT is built. If it is the first time that this triplet is seen, or if the triplet was first seen, less than 5 minutes ago, then the mail gets rejected with a temporary error. Hopefully spammers or viruses will not try again later, as it is however required per RFC.
Best Free Postgrey Alternatives
If you want similar software to Postgrey, we have a list for that. Are there Postgrey alternatives out there? Let's find out.
SpamAssassin
FreeOpen SourceLinuxUse this program to "Unspam" your mailbox(es). The program can be integrated with the mail server to automatically filter all mail for a site. It can also be...
BullGuard Spamfilter
FreeWindowsMicrosoft Office OutlookThunderbirdMost people find spam e-mails the biggest nuisance on the Internet. Today, spam e-mails account for over 80% of all e-mail traffic and their volumes increase daily....
Postgrey Reviews
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