* Dominic Raferd: > I have to disagree with the last two sentences. In the real world > almost no-one uses mailing lists - we are a self-selected group.
I have to disagree with the last two sentences. Looking at the traffic we process, our customers very much use mailing lists in the real world. YMMV, but to dismiss the importance of mailing lists is unreasonable. I found using different domains (or subdomains) a reasonable approach: [email protected]: Primary address where mail integrity is important. [email protected]: Secondary address for mailing lists etc. In this scenario, mail from "example.com" would be DKIM signed, and a DMARC policy of quarantine or even reject is possible. Mail originating at "sub.example.com" however may or may not be DKIM-signed, and the DMARC policy should either be completely absent or *not* of the type quarantine/reject. Obviously, an unrelated domain "whatever.com" can be used to substitute "sub.example.com". Given the negligible cost of domains these days, it is just a matter of personal taste. -Ralph
