Quote:
Originally Posted by n5bb
We can't tell if the message was properly forwarded with SRS (allowing SPF to pass) or if DKIM passed when received at Gmail.
|
I believe DMARC insists that SPF pass on the From: header in order for SPF to be considered as passing. If Fastmail is set to SRS, SPF should pass on the Return-Path: header (envelope sender) but that does not generate a pass for SPF, since that requires it pass on the From: header. It might be better if Fastmail is set to
not use SRS, forwarding will probably cause a softfail for this vendor (using ~all), and I am not sure how Google will treat that as far as spam purposes are concerned.