My O/S is Windows XP Home Edition (5.1.2600) and my Email is MS Office Outlook 2003 (11.8313.8221 SP3). When I'm in a file folder, (pictures) the SEND TO MAIL RECIPIENT option is missing. When it was there, I would select it, the click the radial on the ensuing dialogue box to "minimize" the picture size. The SEND TO MAIL RECIPIENT option is gone today. I don't know when it went away, why (perhaps as part of a recent automatic update?), or how to restore it.

In Internet Options ensure Outlook is set as the default mail handler

Thank you, but that's not it Outlook is (and has always been) set as the default mail handler.

Try;StartRunregsvr32 sendmail.dll

That worked! Thank you!