Problem : 5.1.0 Rejected by bounce verification
I received this error
Final-Recipient: RFC822; firstname.lastname@example.org
Remote-MTA: DNS; mx.xyz.com
Diagnostic-Code: SMTP; 550 #5.1.0 Rejected by bounce verification.
I don’t know why it’s a valid email address ?? what I should do about it???
Solution: 5.1.0 Rejected by bounce verification
It sounds like the destination server is using Sender Address Verification, and your own mail server is setup not to receive Bounce messages in this manner.
See if the following help at all:-