Question Change DKIM signature prefix

[Hausherr]

Server operating system version

Debian 11

Plesk version and microupdate number

18.0.41

How can I change the default prefix of the DKIM signature? Can this be done directly in Plesk or does it require configuration in Postfix?

 

[Ehud]

To my understanding you can change (or add) a selector instead of the Plesk 'default' and also add that selector as file name near 'default' file_name which contains the private.key, on the Plesk server.

What I'm not sure about is, would postfix fetch not only the 'default' selector key when generating emails and signing them?