On Thu, Feb 21, 2013 at 9:13 AM, Chris Knadle <[email protected]> wrote: >> > This seems to be a design issue : >> It's not an exim design issue. It is a design issue of the SMTP >> protocol. Once you get to the data phase of an smtp email delivery, >> > a new acl "acl_per_recipient" could solve such problems on an elegant >> > way. >> An experimental proposed SMTP protocol called PRDR (Per Recipient Data >> Responses) from several years back is exactly what you describe. It > I pulled the Exim master and found reference to the expired draft PRDR spec in > /doc/doc-txt/experimental-spec.txt: > http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt > PRDR requires opt-in by the sending MTA during the MAIL FROM command, and also > changes the response after the DATA command if there are per-recipient > handling differences. This means that it only works with other MTAs that also > implment PRDR, which at the moment sounds very rare. > > If the other MTAs implement this it could be very worthwhile, but I'm not sure > what the chances are of the MTAs getting support for this.
The sendmail patch is available for a while from: http://mail.aegee.org/intern/sendmail.html#patches One mailer, Meta1, has had it for years: http://www.meta1.org Weitse has said that he'd consider implementing it back in 2011 when I first expressed an interest in the draft (I stumbled upon it 5 years after the draft was actually produced and released): http://www.mentby.com/Group/postfix-users/per-recipient-data-responses.html ...Todd -- The total budget at all receivers for solving senders' problems is $0. If you want them to accept your mail and manage it the way you want, send it the way the spec says to. --John Levine -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
