For Microsoft Outlook Express 5.0 and Microsoft Outlook Express 6.0, follow these steps to add Mail Recipient in the send to sub menu. If the .MAPIMail file does not exist in the Disk:/Documents and Settings/username/SendTo folder, the Mail Recipient command is not shown when you point to Send To on the File menu.

1. Start-menu, type r=Run, then type:
regsvr32 /u %windir%\system32\sendmail.dll
and then press OK.
2. Type the following command to reregister, and then click OK:
regsvr32 %windir%\system32\sendmail.dll