On day the Send To option lost the Mail Recipient option from a clients Windows 7 system. The client was using Outlook 2010 and the typical solutions posted that suggested creating a new Mail Recipient didn't work.
The following solution did work for our client.
We hope that this information is helpful. Please let us know how this has helped you or if you have additional questions. As always Firestone Technical Resources, Inc. is here to help with your computer support issues - "Providing personal service for your impersonal technology."
Worked with Windows 7 and Outlook 2003 after adjusting for file location of Outlook on a 64bit system. Thank you for posting this fix.