This one has really gotten under my skin. After I ran the Anniversary Update I had several app update to run, one being the Mail. I installed it, fully trusting Microsoft. Well it’s broke.
THE ISSUE: After opening it , it hangs and does not load a message, after a few minutes it crashes. It will do this 4 or 5 times. When I try to create a new message I can’t get the curser to go into the message field. Typically it has to crash several times before it works properly.
DON’T: If you encounter this issue do not uninstall the Mail app, even if Microsoft advises it, why? The mail app is tied directly in with the Calendar app and thee People App. Currently the People App after the Anniversary Update has sync issues. If it is working properly and you alter it in any way the sync feature may stop. The only fix for this is a clean install (see previous post here). Microsoft’s catch all fix is to remove and reinstall but I do not believe Microsoft’s staff is fully aware of the cross integration of their own apps. Removing one app will cause issues across the entire Windows 10 install. So if you remove the mail app you may create more problems and Microsoft will not care. My suggestion is to wait it out. Microsoft is aware of the Mail app issues and hopefully will issue a fix.