I am a web programmer and I am configuring bounce mail. I get this error:
“Error sending email to email@example.com SMTP Error: The following recipients failed: firstname.lastname@example.org: email@example.com: Sender address rejected: not owned by user firstname.lastname@example.org”
I configured and followed the documentation and changed settings in config.php. I have PHP list v3, Linux VPS PHP -v 5.6
If I put $message_envelope same as sender then it works, but I can’t use a different email to deliver bounces!
I am using namecheap.com email hosting.
What is the fix?