>> >> --On Tuesday, September 06, 2005 12:38 AM -0700 List Mail User >> <[EMAIL PROTECTED]> wrote: >> >> > You have the unfortunate luck of being on the cutting edge >> > of the spam runs, most of these domains are now in 4 or 5 SURBL >> > lists, which will give you scores of close to 12 alone. >> >> Greylisting would help here. If you greylist an unknown source long enough, >> and it gets into SURBL during the delay, you'll get the SURBL score boost >> when (if) the retry is attempted. >> >> Alas, commercial recipients can't use greylisting as effectively because >> they expect to accept legitimate mail from a lot more unknown senders. >> >> And greylisting during a disaster like Katrina could block mail from >> friends using unusual modes of sending (like an Internet cafe terminal). >> I know the problem with commercial recipients but I dont fully understand it (running a mailserver for clients that dont like greylist, myself) Basically a short greylist hold time (few minutes) is sufficient to block spam from machines sending directly to your server. The internet cafe is supposed to send via an upstream mail relay or run their own mailserver, so the message would get through within minutes. The one thing that is stopped by greylisting is the ability to ask a new contact on the phone to mail some material, and then discuss it right away (and in real life mail delivery often is not that instantaneous, anyway)
Wolfgang Hamann
