Data Intelligence, Business Analytics
It looks like most of them still rely on Naive Bayes applied to individual keywords, to flag messages. They fail to catch 90% of the spam, yet have a terrible "false positive" rate - as high as 5%.
Are there any companies working on customized (e.g. per email account) solutions? Are there any spam detector that
I thought the gmail's spam detection is pretty good. Haven't seen a spam in my gmail a/c for years. That is not to say that the problem is solved, but can you give a reference where you are seeing the terrible spam detection that you are mentioning?
I think spam detection algorithms to block outgoing mail are especially poor. The ones to block incoming mail are better.
Why should the algorithms be different for the two cases?
Also, who would employ spam detection algorithms to block outgoing mails? Not the spammers ...
Yahoo / Gmail / Hotmail certainly use spam detection for outgoing messages. Also, your mail client might be sending spam without your knowledge, if you've been infected by a Botnet. That's why blocking outgoing spam (which can be performed by your ISP) is as important as blocking incoming spam.
Good point - agreed. Thanks.