pmg 6.1

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. Error...

Hi, 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? Thank you...