In 99% of cases, you receive this error when you write an email to a domain that doesn't exist. It most likely existed in the past, but the domain owner decided to stop renewing their hosting service. Thus, this is a permanent error. There's no point in trying again. Simply delete that email address from your contact list. Example of the error: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: info@example.com The mail server could not deliver mail to info@example.com. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
When I write to an email address I get back the error: The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.