On Dec 17, 2007, at 7:56 AM, Eric Crist wrote:
I hear a lot of people saying that greylisting doesn't work, when I have actual numbers for my network proving it does. These numbers are from the first week of May 2007 to today:

Greylisted/Rejected Messages:   187560
Spam Tagged Messages:             3806
Virus Tagged Messages:               0
Bounced Messages:                    7

Total Messages Sent:               761
Total Messages Delivered:        25345

I'd second the recommendation, although my stats don't keep long-term track of the difference between something greylisted and something bounced due to policy-weightd. Over the past year, I've had:

Rejected Messages:      1,624,353
Spam Tagged Messages:   39,633
Virus Tagged Messages:  2947
Bounced Messages:       7609

Total sent:             103,433
Total received:         122,614

About 93% of the incoming traffic gets rejected permanently (via policy-weightd) or temporarily via greylisting; of the remainder, about 40% is tagged as spam and about 3% is tagged as viral.


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