Mark Horn <[EMAIL PROTECTED]> writes: > I wonder if sendmail (specifically) rejects unknown addresses immediately > because it was originally developed when bandwidth was not so cheap, > and receiving an email was not worth the bandwidth once you knew that > you weren't going to deliver it...? Perhaps exim/postfix just copied > the sendmail behavior...
Could be. Another thing Sendmail does is support the VRFY command (part of the SMTP protocol). At the time that qmail was written, spammers were starting to send many, many VRFY commands to mail servers to try to find valid addresses. If you send the qmail SMTP server a VRFY, it will simply respond "send some mail, i'll try my best". > The choice that qmail has made to do this, does have a consequence. > If I send something to "[EMAIL PROTECTED]" I'm going to get a > bounce from your qmail probably indicating that the MTA is in fact qmail. In qmail's case, that usually deters attackers on the spot. In Sendmail's case, as you pointed out, the opposite effect often occurs. <wink> Tim _________________________________________________ tmda-workers mailing list ([EMAIL PROTECTED]) http://tmda.net/lists/listinfo/tmda-workers
