"Vahric MUHTARYAN" <[EMAIL PROTECTED]> wrote on 11/20/2006 04:33:23 PM:
> Hello Everybody, > > I'm using SA for a long time without any problem, nowadays > spammers are using too much graphical objects and they are tring to > change it day by day. I'm tring to use fuzzyocr but it's taking too > much cpu. I think that try greylisting . I wonder are there anybody > use greylisting ? Somebody can give me feedback ? > We've used greylisting very successfully. Probably stops 80%-90% of the spam from even reaching SA. Several things to be aware of. Greylisting will introduce a delay that you have no control over. So if you require your mail to be delivered immediately, it may not work for you. Not all mail servers respond properly to the temp error and don't try to resend. Some mail servers don't retry for a very long time and your mail can be delayed for a very long time. I've seen an 8 hour delay once. That said, our average initial delay is between 5 - 10 minutes, most users don't notice it at all. After that, the mail isn't delayed at all. HTH Andy
