Just bumping this :)On ons, 2018-08-22 at 14:34 +0000, jonat...@selea.se wrote: > > Some background: > We have an Exchange 2013 server that do not seems capable of setting > a Return-Path header when a user has Autoreply on. > For example, I am mailing "u...@company.com" and that user has an > Autoreply/OOTO on his/her account, exchange sends an Autoreply back > without an "Return-Path" header which causes it to be classified as > spam - because it is technically spoofed. Link below explains the > issue more: > https://social.technet.microsoft.com/Forums/office/en-US/93cde90c-495 > b-4ae9-8e37-f8267f93a0ee/exchange-2013-on-prem-ooto-ndr-replies-fail- > dmarc-authenication-outbound?forum=exchangesvrsecuremessaging > https://social.technet.microsoft.com/Forums/en-US/51519377-48f5-4833- > ac0d-4128eaf9c25e/how-do-you-setup-dmarc-to-allow-null-returnpath- > rfc5321mailfrom-messages-out-of- > officendr?forum=onlineservicesexchange > The "solution" I could think of is to route all the emails via a > postfix server that adds DKIM, ARC and also a Return-Path header (or > modify it) to a correct one. > Is it possible? > I have the "always_add_missing_headers = yes" directive active in > main.cf but I am still getting this: > > Return-Path: <MAILER-DAEMON> > Have you solved a similar issue in the past? And how did you solve > it? > > Thanks!
signature.asc
Description: This is a digitally signed message part
Description: S/MIME cryptographic signature
