Aside from the question in the subject, because I see this brought up a lot on the mailing list in relation to email forwarding, would passing ARC signatures even matter when the problem is that Google is increasingly rejecting forwarded emails due to the DMARC policy of the original sender domain?

We've had great results for a long time just using SRS. I know how some of you feel about it, but using the tools in front of me, SRS has done the job. But now that Google is pushing DMARC harder, more and more domains are setting their DMARC policy to reject, and Google appears to at least be enforcing this more than before. From the look of it, we can no longer forward emails from Yahoo to Gmail:

550-5.7.26 Unauthenticated email from yahoo.com is not accepted due to domain's DMARC policy. Please contact the administrator of yahoo.com domain if this was a legitimate mail. To learn about the DMARC initiative, go to https://support.google.com/mail/?p=DmarcRejection ev25-20020a056808291900b003be1cb5a890si971207oib.250 - gsmtp

Is it time to throw in the towel on email forwarding? Nearly 100% of users who forward email do so because they want it in Gmail. POP3 fetch has it's own concerns (local to local mail imported over POP3 fails SPF on import and gets filtered to spam). I'm quite skeptical that ARC fixes anything but theory and how people wish it was (or hope for it to be) trusted.
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