I have one static IP, with one server running Proxmox VE.
I have installed Virtualmin for mail server and Proxmox Mail Gateway.
I forwarded the port 25 to PMG. I created a transport map in postfix to PMG.
Outgoing mails are fine. Incoming mails are getting bounced back.
For the past few weeks, I've been having problems with incoming e-mails from Yahoo.
PMG is putting them into spam, when they are not.
When I open the information about the spam, I see that there is a DMARC_REJECT that adds 10 points to the spam score.
What can I do about this?