The e-mail address that is specified with the ExternalAddress parameter is already mapped to an internal address by another address rewrite entry. If you want to map the same external address to multiple internal addresses, you must set the OutboundOnly parameter to $true for each address rewrite entry.
The e-mail address for this recipient was found in Active Directory and the message is in the process of being delivered. ...
The e-mail address is invalid or does not exist in the recipient e-mail system. One of the most common causes is that a recipient ...
The e-mail address is invalid or does not exist in the recipient e-mail system. This code may be caused by an invalid non-SMTP ...
The e-mail address policy object "{0}" is invalid because it contains invalid e-mail address templates: {1}. To view details ...
The e-mail address that is specified with the ExternalAddress parameter is already mapped to an internal address by another ...
The e-mail address that is specified with the InternalAddress parameter is already being rewritten by another address rewrite ...
The e-mail address you entered couldn't be found. Please check the recipient's e-mail address and try to resend the message. ...
The e-mail message couldn't be delivered because its format was damaged. Try creating a new message and sending it again. ...
The e-mail message couldn't be delivered because the delivery wasn't completed within the time limit configured by the administrator. ...