[ruby-talk:444008] Re: test

That's quite normal. 1) if you changed any content related to body, subject, recepients etc, that will break DKIM. If dkim was broken, some providers will reject the messages. 2) your list provider must have SRS setup. otherwise it will break SPF. 3) Even if you have SRS setup, this has no helps to DMARC, since the evolope address is list address now. And since your DKIM was broken due to adding footer etc, your DMARC will fail entirely. 4) to improve the delivery issues try to do: (a) don't modify any message content; (b) setup SRS for forwarding; (c) if content modification is must, use ARC to adjust it. references: SPF - https://en.wikipedia.org/wiki/SPF SRS - https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme DKIM - https://en.wikipedia.org/wiki/DomainKeys_Identified_Mail DMARC - https://en.wikipedia.org/wiki/DMARC ARC - https://en.wikipedia.org/wiki/Authenticated_Received_Chain Thank you November 26, 2022 at 2:34 PM, "Shugo Maeda" <shugo(a)ruby-lang.org> wrote: