[MM3-users] Re: Using external services for deliverability?

On 7/3/20 7:27 AM, Tom @ Gather wrote:

Thank you both for the help. I have SPF and reverse DNS setup. But I thought DKIM is no help because Mailman rewrites the email headers?

In most cases, Mailman will make transformations to the message which will break any incoming DKIM signature, but you still want to DKIM sign your outgoing mail with your own domain's DKIM signature.

This will not in itself allow list messages to pass DMARC which is why Mailman has DMARC mitigations, but it will still provide a valid DKIM signature from you which will help with deliverability.

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