Hi,
The issue I am facing is that all emails that I am sending are returned with error 550 5.7.1 [ESA] Sender blocked. Upon checking email deliverability via cpanel I see an alternate mail HELO with the problem in reverse dns part stated as The system uses an alternate HELO of “xyz” when sending mail from the “my” domain.
The system sends the domain “xyz” in the SMTP handshake for this domain’s email. (which resolves to a different ip address)
I would appreciate if anyone can help fix this problem or if someone could tell that if there is an unauthorized access to my emails. Thank you in advance.