In message <20130721041338.2121.qm...@f5-external.bushwire.net>, "Mark Delany" <n...@delta.emu.st> wrote:
>> servers running certain protocols. For example, the rules of the SMTP >> protocol... just to name one... require that a client wait until the >> server has sent out an initial greeting banner before the client sends >> anything to the server. Some SMTP servers are lenient about enforcing >> this protocol rule, so in practice it may often not be necessary to wait > >A while back "fast talkers" as they were called, were a known >signature of some spam bots. That is correct. >The guess is that they would just write >the whole SMTP transaction in one write() immediately following the >connect() and be done with it. Yes. >A useful optimization when you're >blatting out billions of spam. I suppose so. >You don't see a big mention of this in search engines, so I don't know >how prevalent they are now. > >Point being that such an option might be useful to avoid triggering >any detectors that might still be looking for this. I'm sorry, but I am not following you. Were you attempting to say that this would be a good thing or a bad thing? (Personally, don't think it matters much one way or the other. Blocking "fast talkers" was never a terribly effective anti-spam technique. It was just "security through protocol pendantry", and was/is quite entirely trivial for the spammers to work around.) Regards, rfg _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
