Mailman-Users

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mailman-users@python.org

July 2026

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Munge or don't Munge
by Dave Nathanson July 20, 2026

July 20, 2026

Hi, I'm familiar with Mailman v2 at DreamHost, and now setting up & learning Mailman v3 with Affinity at EMWD.com (EMWD is looking good so far, review coming later). One setting I'd like to check in about is MUNGE . What should I be doing with Munge? My gut feeling is to use; "Explicit Reply-To header set". But I'm here to ask, not to tell. The drawback is that after Munging the "From", it is no longer trivial to see who sent the message to the group. Sort of good. Sort of bad, depending. I mostly prefer to easily see the poster's email address. And the big mail providers would mostly accept this From format if it matched the Mailman sending server. I have set up everything I can think of to try for good delivery; SPF, DKIM, DMARC, and a SSL certificate on the server. My discussion group lists all work best with any reply being sent to the list, not to the poster directly. And it is helpful to somehow indicate who wrote the message. The Munging options I see are: No Munging Reply goes to list Explicit Reply-To header set Explicit Reply-To header set, no CC added. And there are some similar DMARC Mitigations. Anyway, are we still doing Munging with MailMan v3 with Affinity? >> What is the v3 best setting for handling the From address? Best, Dave Nathanson Mac Medix

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