[simscitizen]

Mandatory DMARC basically breaks all e-mail forwarding services (SPF doesn't survive forwarding due to modification of Return-Path). I think ARC/RFC8617 is supposed to be the fix for that, but it's not even standardized yet. This seems like a rather big issue?

[mjw1007]

Have Google actually documented what they mean when they say DMARC is mandatory?

Does a DMARC record with p=none count?

Does DMARC with an SPF record that that places no restrictions count?

[illiac786]

That is a massive problem for me indeed, if true.