The E-mail Client You Want to Use Does Not Appear in the Screen for Selecting an E-mail Client

Check: Check that the e-mail client's MAPI is enabled.

See the e-mail client's manual for how to set MAPI.

If the problem is not solved even when MAPI is enabled, select None (Attach Manually) in the screen for selecting an e-mail client, then manually attach the image to the outgoing e-mail.