There has been a recent surge in spam.

     There are two causes.  One is that there have been an increased number of Windows machines compromised and being used in botnets to send spam.

     The other is that more is getting through the spam filters because the spammers have devised a way around Bayesian filtering.  They have developed software that uses an electronic thesaurus to substitute various synonyms in the spam they send so there are many different varieties of the same spam.  Thus the spam you flag doesn’t prevent it from getting through the filters to others because it’s been changed just enough to evade the filters.

     I don’t have a solution for this yet.  I’m sure it’s being worked upon and as soon as a defence becomes available I’ll look for a way to integrate it into our system.