IMCEAMAILTO errors in Exchange

Delivery has failed to these recipients or groups:

‘’ ( <>
A problem occurred and this message couldn’t be delivered. Check to be sure the e-mail address is correct. If the problem continues, please contact your helpdesk.


Diagnostic information for administrators:
Generating server: MY-SERVER.mycompany.local
#550 5.4.4 ROUTING.NoConnectorForAddressType; unable to route for address type ##

Scenario & Resolution:
This appears to occur in Outlook 2007/2010 with an Exchange Server when the MAILTO link is clicked in an email.  The issue is not apparent in Outlook 2013 using 365.
Please follow this link for the detailed issue and resolution:


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