A big problem in Card Scan

Hi I see this problem in my computer when I send mail to my friends.
When I send mail then windows show this error message.
"Could complete the "Send Mail To" command because an unspecified error occurred in the email software.
Check that the email software is installed and properly configured"
Why do I see this error and what is the problem on my computer?
Anybody knows what’s happen on my computer.
Please tell me and help me solve this problem.
Thank you

