[MM3-users] ARC signing outgoing mails

Hello,

in https://mailman.readthedocs.io/en/latest/src/mailman/handlers/docs/arc_sign.... I found this hint

"It is highly recommended that Mailman maintainers configure ARC siging of their outgoing email.  ..."

So I added in my mailman.cfg: " [ARC] privkey: /path/to/private.key "

But I don't understand the meaning of

"... and located at: " #{config.ARC.selector}._domainkeys.#{config.ARC.domain} –ex.– test._domainkeys.example.com " Where can I find this string or where do I have to place it. I am using bind9 as dns-handler.

Thanks for your advice in advance.

Regards

Wolfgang