I believe that the problem with Windows Mail 12 started shortly after I downloaded Windows 10 sometime in Feb.

When I open Windows Live Mail I receive a dialog box stating that "Windows Live Mail has stopped work"

"A problem caused the program to stop working correctly. Windows will  close the program and notify you if a solution is available."

But I never receive a solution. If I  X out the box the mail program closes. If I leave it and move it, I can read my mail. I thought it might correct itself automatically...But it hasn't. Sometimes my emails go out after 2 or3 attempts, but other times they never go out.