On Tue, May 24, 2005 at 03:57:06PM -0700, Ian Greenhoe wrote: > On Tue, 2005-05-24 at 23:15 +0200, Michelle Konzack wrote: > > Am 2005-05-24 13:28:04, schrieb Ian Greenhoe: > > > There are several solutions that I can see: > > > > > > 1) Have the mailserver reject the first delivery attempt by a non-list > > > recipient. (Or, for that matter, the first delivery attempt of *any* > > > mail.) > > > > <lists.debian.org> should be easyly reached by all $USER and > > most newcomers do not know, how to subscribe to mailinglists. > > It appears that you do not understand what I'm talking about here. SMTP > (the protocol via which all public email is sent) allows for the fact > that the remote machine may not be available or may be flaky. Compliant > servers will deal with a server that non-fatally rejects an email by > waiting a few minutes and re-transmitting. Spammers rarely, if ever, > use compliant servers (they can't afford to with the volume of email > that they are sending.) > > What happens with a real server with this scheme is: > 1) It attempts to send. Send fails: temporarily rejected. > 2) It puts mail on queue to re-send. > 3) It attempts to re-send the mail. Send succeeds: Mail succeeds. > > What happens with a spammer's server with this scheme is: > 1) It attempts to send. Send fails: temporarily rejected. > 2) It gives up, moving onto the next target. > 3) Send fails. Mail is blocked. > > See greylistd for an example implementation. > > > > 2) Require that someone who is not on the list to respond to an > > > automatic response. > > > > Most people I know (including myself) send challange-reponses > > to /dev/null (I get every day such bullshit) > > My experience is the *exact* opposite. Personally, I'd rather have to > deal with a challenge-response once -- which, mind you, is how you get > on this very list -- then have to deal with the hordes of spam that you > (and many others) are complaining about.
C/R Systems are just as bad as spam. -- Chris. ====== -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
