I would like to ask you for some help. I just installed mailcow and everything is running great so far. I have two domains example.org and example.de and mailcow on mail.example.de. Currently I have configured example.de according to the description of the mailcow docs.
For example.org I am now trying to forward to mail.example.de and I have set the following DNS records:
mail.example.org MX 10 mail.example.de
mail.example.de A xxx.xxx.xxx.xxx
@ txt v=spf1 ip4:xxx.xxx.xxx.xxx -all
Could someone explain me how I have to set up DKIM and DMARC for the forwarded domain? Thanks a lot for your help.