Why not use your mta to rate limit the connection? For example in postfix if the ip address is untrusted, spawn a slower smtpd. A way of slowing down is by introducing time delays at every step in a typical MAIL FROM/RCPT TO/DATA/QUIT process (or by assigning a very low task priority number). From the point of view of the spammer, he/she is dealing with a slow link. Modifying your mta source code maybe less costly than changing your infrastructure.
Just an idea. rowel Orlando Andico said: > > This will work for me, because Linux supports all this functionality. > Also it happens on the network level, so DoS of the SMTP server becomes > a lot harder. However, I was curious as to whether this is doable some > other way. > -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie
