On 11/5/20 4:54 PM, Kala Balik wrote:

    My question is: What is wrong here, my SPF or DKIM settings OR my
    Mailman-DMARC settings?

I suspect it is your DKIM signing settings that sign the mail if it is To: n...@domain.tld but not if it is To:n...@subdomain.domain.tld.

Are you signing with opendkim? If so, what are your opendkin.conf settings for SenderHeaders and SigningTable and what is the content of the file referred to by SigningTable?

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