DKIM Details

Sep 17, 2020
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I didn't want to piggyback on other posts, so here are my questions:

I didn't have DKIM signing on in PMG, my domain already had for default._domainkey.mydomain.com with public/private keys.
It also had 2 selectors for M365/O365.

Of course we now all are trying to ensure we have all the bases covered and putting DKIM & DMARC in full affect.
I turn on DKIM signing in PMG, then didn't put "Sign All" so I can test first, and then in the sign domains put mydomain.com.

This now turns on signing for the domain.

I edited the selector and called it PMG, I added PMG._domainkey.mydomain.com cnamed to pmg.server.name in DNS.

Now the first clarification is, do I then make a TXT record with the public key
for the selector? pmg._domainkey.mydomain.com?
I'm seeing errors and trying to figure out what I'm missing.
Lastly, for every domain I would put this selector right?

Thanks!
 

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