17 May
2023
17 May
'23
1:30 p.m.
On 2023-05-17 06:22:58 -0700 (-0700), Christian via Mailman-users wrote:
How does Mailman handle spf/dkim/dmarc? Specifically, does it re-signature originating sender emails not caring whether or not the originating email has proper spf/dkim/dmarc signatures? Or does it NOT re-signature originating sender email, i.e. just pass them through without alteration?
All of the above. You can configure the DMARC handling rules on a per-list basis, though if you want to re-sign with a new DKIM signature you'll need some additional configuration in the MTA to handle that part of the process.
As for SPF, that's entirely orthogonal. SPF is purely a set of rules in DNS records saying what hosts you expect will send messages for your domain. That doesn't require any alterations to your list or agent configuration, though you may end up configuring use of a smarthost in order to comply with an existing SPF policy rather than amending your SPF policy to include your MM3 host directly.
Jeremy Stanley