Hi,
I get the following error message from Outlook 2000 when trying to send
any email:
"Microsoft Outlook could not sign or encrypt this message because you
have no certificates which can be used to send from the e-mail address
'[my-email-address]'."

The problem started when I tried to implement digital certificates for
sending email to solve a different issue external to Outlook (not
detailed here for brevity's sake).  The issue is no longer a factor, so
I don't need the certificates.  I removed the certificates and I
started getting the error mentioned above.

The only solutions posted to this problem mention going to
Tools/Options/Security and clearing the "Encrypt contents..." check
box.  However, the box is unchecked and it is disabled.

Other pertinent info:
o  Outlook 2000 SP-3 in "Corporate or Workgroup" mode (No Exchange
used)
o  O/S - Windows XP Pro
o  I am able to receive email
o  I have tried all of the following in various orders:
 - Reboot
 - Reinstall Outlook
 - Remove and re-enter email services (Tools / Services)
 - Reinstall Office into a different subdirectory (It still managed to
find my PST file located in a personal directory.  I looked for a way
to safely wipe out Outlook settings from the registry, but the only
utility I found is not deemed safe for XP.)

Any help will be greatly appreciated!  Thanks for taking the time to
read this.
--mike