Yes, this. Except sometimes, like when Comcast looks at your DMARC policy that specifically says "p=none" and decides that means "reject all mail from this dom

Yes, this. Except sometimes, like when Comcast looks at your DMARC policy that specifically says "p=none" and decides that means "reject all mail from this domain". Gotta love those guys. Edit: s/spf/DMARC