On Sat, Feb 14, 2026 at 11:35:03AM +0800, Kevin J. McCarthy wrote: > Now that we're back to applying patches from the mailing list, I have a > question about technique. > > The Mutt mailing lists have "dmarc_moderation_action" set to "Munge From", > which means when a sender's domain has a DMARC Reject/Quarantine Policy set, > the mailing list rewrites the From address. > > Without this, a fair number of receivers bounce the message, which ends up > unsubscribing them eventually.
If the senders are including valid DKIM headers, and the MX of the subscribers is capable of verifying them, then the messages should pass DMARC Reject. So maybe only rewrite the From address if the sender doesn't sign the original message? And of course, don't strip the DKIM headers from the original post when not re-writing.
