Hi Ted, On Tue, May 10, 2005 at 11:24:38AM -0400, Ted Zlatanov wrote: > John Levine wrote in news.gmane.org:gmane.mail.qmail.general: > > "I hear good things about a simple anti-spam technique that simply delays > the initial SMTP banner and looks to see if there's input. A real SMTP > client will wait for the banner and only sends ahead after being invited > to do so when it sees the pipeline resposne to EHLO. Spamware just blasts > away. It rejects vast amounts of spam with negligible false positives. > Different people use different delays. Some use five seconds or so, > others do 60 to 90 seconds, with a whitelist for hosts it's seen before. > > I looked through the archive and I didn't see anyone doing this with > qmail. So before I hack it up myself, is anyone doing this with qmail?
I know this isn't really what you're asking about, but qpsmtpd (http://smtpd.develooper.org) is a drop-in replacement for qmail-smtpd and has supported this for about a year, as well as lots of other leading edge anti-spam stuff. I'm using it with a couple of qmail-ldap instances, and they play together beautifully, so it might a useful alternative for some people. Cheers, Gavin
