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Originally Posted by inigoml  Training with spam is a good policy. However, spammers are changing the way to send spam. At this moment, you will receive a lot of spam containing images. Training is not useful for this spam, since bayesian filters cannot be trained with images. There is a plugin for "OCRing" images, but it's very CPU intensive.
I suggest to implement a greylist based system. It's really IMPRESSIVE how spam will decrease. There is a SQLGrey tutorial at wiki. I've not tested with SQLGrey because our perimeter mail servers uses postfix-gld service, but it's the same thing. |
I posted to the postfix-users group (good bunch of people) a question on how to send saved off mail messages (full headers and all) through my mail system when they reside in a text file. All of them discouraged me from doing this as it may screw things up. Now they say doing it with your own spam is good but not from a spam archive as it was not intended for your domain and you may create problems