I have a working external managed mail system for our company domain. Additionally I am currently trying to setup a second mailserver (which I have control over) for the same domain with DKIM with postfix.
The externally managed main mail server should continue to send emails normally via its own DKIM signatures, the newly created mailserver should start signing with its key.
I will be able to use either of these mailservers for sending mails.
Now my concern is:
If I add DKIM signatures to my domain's DNS records, will I still be able to safely send mails via the primary managed mailserver that also does DKIM or will it then complain somehow.
I just want to make sure, that mails from the managed mailserver (with its own DKIM) will not be treated as SPAM once DKIM is enabled for the secondary mailserver.
Also to note, the managed mailserver already has two DKIM DNS records: (Note: there is whysover no domain part in the DNS name entry)
The name part looks strange as I thought the domain name itself must be present...
The following is what I want to add now:
Can they interfere somehow?
Added note that the already configured DNS record does not include the domain name in its name field for DKIM