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Wibble > List archives > postfix > 2004 > October [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: User-specific bounce messages?
That's called Challenge-Response, and is a REALLY BAD IDEA. All it does is clog bandwidth with mostly undeliverable responses to SPAM and makes the whole problem worse. In fact, since Spammers are more and more using forged deliverable return addresses, you'll be sending challenge emails to real people that have no relationship to your users but just happen to have their email addresses used by Spammers. This is not just my opinion. Here's an example policy statement from the RISKS forum moderator: Due to the manual administrative burden created by "challenge- response" anti-spam systems, no response of any kind will be made to any received e-mail found to be using such systems. This includes e- mail to the list handling system or any other addresses. Any subscribed addresses found to be generating such challenges will be removed from the mailing list and will be barred from re- subscription. Sorry, but challenge-response is simply the wrong way to try stop spam! Dan Delaney wrote: Hi all.Is there a way to set it up so that each user has his/her own whitelist, and if a message comes in from someone who is not in the whitelist, make a user-specific bounce message be sent back to inform the person how of a webpage to go to to contact that user?Thanks --Dan -- James Garrison Athens Group, Inc. mailto:jhg@xxxxxxxxxxxxxxx 5608 Parkcrest Dr http://www.athensgroup.com Austin, TX 78731 PGP: RSA=0x92E90A3B DH/DSS=0x498D331C (512) 345-0600 x150
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