Hi I have my server hostname as s104.domain.com I have domain.com on this server which has working SPF,DKIM & DMARC. I tested this using gmail and few other test services by sending mails from various firstname.lastname@example.org
Now the problem is some mails are sent from root@email@example.com which fail DKIM & DMARC. Now the problem is if these mails are a lot then the server's IP get added to SPAM list which I cant afford.
Now how to add DKIM and DMARC for server's hostname and where to do it .