Hi, on other email servers we are using greylisting to stop spam and we’re having very good results. Could this feature be implemented into a new version of Nodeworx?.Thanks!
Some time back, FastMail has implemented greylising on their servers and if I remember correctly, I read somewhere that they were satisfied with that.
Improved spam filtering via greylisting ( http://blog.fastmail.fm/?p=565 )
More greylisting details ( http://blog.fastmail.fm/?p=566 )