while I will say greylisting is the best means of cutting out spam that I've ever seen, it's not 100% I would like to also like to impliment a blacklisting feature, currently I do have exchanges filtering enabled but I'd like something that offers a little more than what exchange does I was thinking something like ORFilter I don't know I haven't read up on many yet, I would really like something that logs what it does.
can you use any other third party applications like this with greylisting?
and if so are there any that are recomended over the others as far as either functionality or compatibility goes?
Thanks!
Brady R. Cole
BradyC Wrote:while I will say greylisting is the best means of cutting out spam that I've ever seen, it's not 100% I would like to also like to impliment a blacklisting feature, currently I do have exchanges filtering enabled but I'd like something that offers a little more than what exchange does I was thinking something like ORFilter I don't know I haven't read up on many yet, I would really like something that logs what it does.
can you use any other third party applications like this with greylisting?
and if so are there any that are recomended over the others as far as either functionality or compatibility goes?
Thanks!
Brady R. Cole
using a few of the more conservative RBLs is a great match with greylisting. spammers that have their act together enough to get past greylisting very often are required to maintain a semi-permanent network location. this makes it much easier for the realtime blackhole lists catch them.
i block about 60% of spam with greylisting and 20-30% more with RBLs. the remaining junk is trickier but can largely be eliminated with the right content based filtering techniques, either heuristic, statistical analysis, or a combination. since content based filtering is hugely more resource expensive to do, blocking 80%+ prior to this is a great thing.