having this problem since a week now, one of my email clients on Plesk can't send mails to a specific domain with the following error:
Undelivered Mail Returned to Sender
Recipient address rejected: No DNS entries for your MTA, HELO and Domain. Contact YOUR
administrator Your HELO: domain.com, IP: xxx.xx.xx.xxx
I've DMARC & DKIM & SPF all enabled
What's the solution to this problem? If the solution is to add a new DNS record
What is its name should be and its value?