Thursday, April 19, 2007

 

Anti Spam Scanning

Our new anti spam features have been running for several days now resulting in a marked decrease in spam.

Previously 89% to 90% of all inbound mail was rejected by our scanners.
As of today that figure is now closer to 93% to 94%

Tests in order and the percentage of mail rejected is as follows.
85% Spamhaus RBL
6% Other RBL's including dynamic range and our own RBL
2% Greylisting
1% Spamassassin including our custom rule set
1% Image spam

Notes :-
Our image scanner rejected over 5000 images in the last 7 days.
50% of the servers attempting to deliver mail which pass the RBL tests did not return after the 5 minute greylisting timeout.

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