To fix the problem, contact the recipient's email admin and give them the error and the name of the external email server that reported the error found in the NDR. Ask them to work with their domain registrar to make sure their domain is properly set up and their DNS records are properly replicated across the Internet.
Only the recipient's email admin can fix this. Unfortunately, Office 365 support won't be able to help with these kinds of externally reported errors.
To figure out why Outlook hangs or stops responding, we can monitor Outlook and log any problems as they happen. Support ...
To finish changing your user ID, sign out, and then use {0} to sign back in. You may need to wait a few minutes for the change ...
To finish uninstalling Office, the Install program needs to restart your computer.{0}{0}After your computer restarts, Support ...
To fix the problem try one or more of the following: Make sure the SPF records at your domain registrar are properly configured. ...
To fix the problem, contact the recipient's email admin and give them the error and the name of the external email server ...
To fix the problem, try one or more of the following: Ask the sender scan their computer for viruses . Ask the sender to ...
To fix this issue, contact the recipient's email admin and ask them to work with their domain registrar (or Web host provider) ...
To fix this, contact the recipient's email admin and ask them to add your email domain to their list of allowed senders. ...
To fix this, work with your DNS hosting provider (your domain registrar, Web hosting provider, or ISP) to set up a correct ...