It's a brain dead forwarder that does that, but most forwarders are brain dead. "aliases" and ".forward" are the most common things out there.
--Jered ----- On Oct 6, 2015, at 7:06 PM, Benny Pedersen m...@junc.eu wrote: > David B Funk skrev den 2015-10-06 22:33: > >> So that explicit forward breaks the SPF chain, thus triggering that SPF >> fail. >> The valid DKIM signature indicates that the message is legit. > > its a brain dead forwarder that use the From: header so, if it used the > envelope sender it would not break spf, forwarding hosts must use there > own domain as envelope sender, if thay think we just use From: header it > breaks spf > > possible that same reason Sender-ID is dropped, and DKIM is now invented > to replace it
