http://www.iks-jena.de/mitarb/lutz/usenet/teergrube.en.html
I call this kind of delay introduction a "spambump", like speedbumps used to slow you down in a parking lot. It does not surprise me that someone else has already though of it. Basically it consist of sending a continuation instead of "250 Mail accepted" when the "." line is received. When determined to be "not SPAM" send the OK, otherwise keep them on the hook for X minutes before sending the reject message. For production use, code would probably need adjustable maximum connection times and adjustable maximum simultaneous thread or maybe something like sendmail's load based processing deferral. Taken to a useful, robust implementation is certainly not an afternoons worth of coding. But I think the idea has a great deal of merit. In addition to the per-line delay discussed, a smaller(?) per/character delay could be used. You might even feed them Project Gutenberg public domain works like the entire text of "The Count of Monte Cristo" (maybe even in the original French?), or "War and Peace" in the original Russian in an effort to educate the schmucks. Sending the continuation message as noted in the Teergrubing web pages would follow the RFC and would be nicer on false positives as they should actually get the reject. Of course the load shedding logic isn't there. Maybe it would be better to make a new sourceforge "SpamBump" milter project since it is not really a SA function, but I am totally ignorant of the birth, care and feeding of a sourceforge project. There is just something about kicking a spammer in the ankles like that that tickles me to no end, I am hoping maybe someone can help get the ball rolling. -----Original Message----- From: Sidney Markowitz [mailto:[EMAIL PROTECTED]] Sent: Friday, September 20, 2002 2:38 PM To: [EMAIL PROTECTED] Subject: Re: [SAtalk] "new" spam host Jeremy Zawodny" <[EMAIL PROTECTED]> wrote: >Hasn't stopped them from attemping to deliver roughly 4,000 messages >per day--every day. How many could they send if traffic from their ip address to the SMTP port on your mail server's ip address went to an SMTP tarpit instead of being simply rejected? -- sidney ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Spamassassin-talk mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/spamassassin-talk ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Spamassassin-talk mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
