On Sat, 28 Mar 2009, Res wrote: > On Fri, 27 Mar 2009, Terry Carmen wrote: > >>> when f...@example.com SMTP connects to our SMTP, I want the message >>> "secretly accepted" (for lack of a better term) but then I want our >>> SMTP to, >>> after accepting, return: 550 service unavailable in their >>> transaction, just as if we had set in access: f...@example.com REJECT >>> ..to avoid accepting then generating backscatter bounce message which >>> is what I can do now in 5 seconds, but I'm trying to avoid that >>> despite f...@example.com being a real address that someone reads. > >> You want to accept the message, deliver it to the recipient and still >> return a 550? > > Correct, although recipient is actually a file in this case. > >> I'm not sure why anybody would want this, but AFAIK, you can't do it >> without modifying postfix or writing a filter. > > I gathered I'd most likely need a milter as a few combinations in postfix > I tried failed, maybe amavisd has this function? I don't use, but might > install it on the server concerned to test, as, although its been many > many years since I've used it, or even looked at it, IIRC it acts in this > way > identical to a milter, but I might be wrong since I moved from it back in > 02/03 I think
Don't use amavisd-new; it would be overkill for this task. And from my cursory understanding of the SMTP protocol, I am not sure your goal is reachable even with a simple pre-queue filter. Before passing mail to a pre-queue filter (or milter), smtpd(8) applies smtpd_mumble_restrictions and rejects unknown recipients. So by the time you get to the filter, Postfix has already replied with "250 2.1.5 Ok" for f...@example.com at the RCPT TO: stage of the SMTP conversation. As a result, the client believes f...@example.com is a valid recipient, defeating the purpose of this exercise. -- Sahil Tandon <sa...@tandon.net>
