> Da: Marc Perkel [mailto:[EMAIL PROTECTED] > What I do is sort of partial greylisting. If a connection is suspicious > I give them a temp error on my lowest MX but accept them on higher MX > records. So that way most MTA will try a higher MX right away and it > doesn't add much of a delay.
Well, it's nice. But expect bots to circumvent this within few months: it's easy. Greylisting works on the assumption that no spammer would waste its precious time by attempting a second time to an smtp server, but they could attempt to a site's higher MXes soon after they get a 4xx from the lowest one... You know: they have to do their dirty work within minutes, or their efforts will be voided by reporting agents and the like (razor, pyzor, dcc, ecc...) or sometimes by the connection provider itself. ----------------------------------- Giampaolo Tomassoni - IT Consultant Piazza VIII Aprile 1948, 4 I-53044 Chiusi (SI) - Italy Ph: +39-0578-21100 MAI inviare una e-mail a: NEVER send an e-mail to: [EMAIL PROTECTED]
