Once upon a time, Ed Greshko ed.greshko@greshko.com said:
On 07/01/16 13:16, Tim wrote:
Well, you're participating on a list for Fedora, and many services are managed by those people. If it's the Fedora list that's misidentifying spam on the way through, its software needs looking at. But I seem to recall the conversation pointing the finger at gmail not properly understanding mailing lists and the to/from addressing being different from personal mail.
It is a "gmail" issue and it is *easily* solved within gmail.
No, it isn't specifically a Gmail issue, it is an issue from the combination of DMARC strict policies, sites that enforce DMARC policies, and mailing lists.
Yahoo publishes DMARC policies that say messages from a Yahoo domain in the From: header should only come from the Yahoo servers. Gmail (and other sites) recognize and follow those policies. When a Yahoo user sends email to a mailing list, and the list server resends the message, it doesn't come from a Yahoo server, so sites that follow DMARC policies reject the message.
The correct solution is for the mailing list software to be changed to rewrite From: addresses. Newer versions of Mailman support this. The address rewriting is annoying, but is the only true solution to being in between sites that publish and honor DMARC policies.