[Mailman-Users] Handling Munged From Addresses

Mark Sapiro mark at msapiro.net
Thu Feb 27 13:38:30 EST 2020

On 2/27/20 10:17 AM, Dennis Putnam wrote:
> Thanks for the reply. I am not seeing that. The From: looks like this:
> From: Rushtalk Discussion List via Rushtalk <rushtalk at csdco.com>

That must be a RedHat thing having to do with their backport of DMARC
mitigations. If you don't like it, install from source.

> In "General Options" for that list I set the item "Replace the From:
> header address with the list's posting address to mitigate issues
> stemming from the original From: domain's DMARC or similar policies."
> with "Munge From." Did I set the wrong thing?

That will apply From: munging to all posts. I have no idea what the
RedHat package does, but if in Privacy options... -> Sender filters you
have dmarc_moderation_action and dmarc_quarantine_moderation_action set
General Options -> from_is_list to No and set dmarc_moderation_action to
Munge From and dmarc_quarantine_moderation_action to Yes and if you have
it, dmarc_none_moderation_action to No.

This will apply From: munging only to those messages From: a domain that
publishes DMARC policy = reject or quarantine.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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