Viktor Dukhovni: > On Tue, Apr 10, 2012 at 12:28:28PM -0400, Wietse Venema wrote: > > > > > RCPT TO:<final-rcpt> ORCPT=rfc822;orig-rcpt ... > > > > > > Does Postfix already send this if LMTP server advertises DSN? > > > > Yes :-) It's the same code for both SMTP and LMTP. > > Since in most cases the LMTP server is not a queueing MTA, I would > recommend a delivery agent option in Postfix that suppresses DSN > NOTIFY=... transmission to the LMTP server. Still send ORCPT, but > handle (any final) DSN in Postfix. > > DSN I think only makes sense with LMTP when the LMTP server is a > content filter that wants to be able to selectively NAK recipients > after content. With LMTP used to deliver to a mail store, I don't > see the point of delegating DSN notices from the MTA to the LDA.
Sure. The LMTP defaults are historically targeted at content filters ("lmtp_assume_final = no"). I have no idea what portion of the installed base would be affected if we were to make a compatibility breaking change. Wietse