>From: Brad Knowles <[log in to unmask]> > >> Filtering MAIL FROM: is not mentioned anywhere in RFC 1123, AND IS BREAKING >> EXISTING, LEGITIMATE, E-MAIL. > > As has been quoted here before: > > RFCs 821, 822, and 1123 specify how email should be > done in a Perfect World by the Angels, for the Angels, and > of the Angels. > > However, this is 1997 -- there are no more Angels > left, and this is about the most imperfect world as could > possibly exist. > > Hey, Brad - that you speaking about ? It is only draft and there are a lot of arguments against it. For exam, address in MAIL FROM was constructed to return errors from mail-transfer-agent (look sendmail), and address in From: is for user-agent. And routing in MAIL FROM can be used to deliver transfer errors in any case, even you can't send mail to From: address. (If you want to protect users from spam you can use something more beautifull) > Lose your love affair with that part of RFC 1123, because it >*is* going away, sooner or later. Maybe not with whatever will >become of draft-ietf-drums-smtpupd-04.txt, but sooner or later it >*will* go away. > If this draft would be incompatible with SMTP (all RFCs set) and practice, please request and use ANOTHER TCP port for this service. Period. - Leonid Yegoshin, LY22