List Mail User wrote: > since you have mentioned that you do/did use Postfix - there is an > option to have Postfix perform that task.
Yeah, but I'm on a mission to convert the binary pass-fail tests in postfix into probability tests in SA, and this is on that list. I don't even use the call-back system in postfix here, but friends and clients have been known to. > That said: everyone I find doing callbacks, gets a letter asking them > to stop (at least to my addresses); Until I recognize the pattern, > they look just like SMTP port scanners and/or address > verification/harvesting `bots. Also, the Postfix notes warn that you > should expect people to complain if you enable the option:) Yep. One option might be to cache addresses so that it only does it once per sender per ~six month window, although I'm not keen on keeping a database with this. -- Eric A. Hall http://www.ehsco.com/ Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
