I’ve set up my server a few days ago on a virtual server.
It is reachable under mail.domainA.link.
If i send mails from xyz@domainA.link to my gmail account everything is fine. Now I’ve set up the same configuration for two domains I bought a few weeks ago. (domainB.de; domainC.org).
If I send mails from either of these domains, they are marked as spam by gmail (even though SPF, DKIM and DMARC are marked as PASS).
I have two reasons in my mind why this could be the case:
1) They are marked as spam as the hostname of the server “mail.domainA.link” does not match “domainB.de” and “domainC.org” (but matches “domainA.link” which would allow those mails to go through) and therefore marks them as spam
2) Google treats those two domains badly as they are relatively new and therefore could be used for spam purposes
Is anyone able to confirm or disprove one of my hypotheses? Or has anyone an idea what other reason could lead the mails to be blocked?
Additional info: I’ve used xyz@domainA.link with another mail service (posteo). Is it possible that gmail therefore “got to know” my domain as trustworthy and keeps it this way, even though it is sending from a new server?
Thank you for helping me.