To use the Send button in the Hallmark program, you must use an email program that is fully MAPI-compliant, such as Outlook. It must be configured as your default email program and work with your email service. To change your default apps, go to Settings>Apps>Default Apps

 

If you use a web-based email service, such Hotmail, Gmail, or Yahoo mail, you must use the Save option and then attach the saved file to the email manually.

 

Applications such as Windows Mail and Windows Live Mail are only partially MAPI-compliant programs, and do not support all of the protocols needed.

 

For details on how to setup Outlook as default program for email please go to this page:

https://support.office.com/en-us/article/make-outlook-the-default-program-for-email-contacts-and-calendar-ff7990c4-54c4-4390-8fe3-c0285226f021