On Dec 7, 2007 12:12 PM, John Peacock <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: > > of course you should run all common qpsmtpd anti-spam plug-ins up- > > front, like: no_dialup, geo_blacklist_whitelist, check_earlytalker, > > and so on. Captcha response mails are only being send to senders whose > > mails have passed those plug-ins. > > But that doesn't change the basic design that all challenge-response > methods have: false positives (in this sense challenges sent out to > forged senders) put you in the same camp as the spammers, sending > unsolicited e-mail.
This plugin might be able to reject unwanted mail during the original smtp transaction if it sent a URL back at that time. The origin MTA would have to pass that on to the user, but then you would not even need the captcha at that point. Visiting the page could be enough to enable the mail. This would also be much more friendly for my visually impaired friends. allan -- "The truth is an offense, but not a sin"
