Unfortunately, Mail has stopped I have an HTC One M8 and am using the stock launcher and am not rooted.

I keep getting the error Unfortunately, Mail has stopped. when I try opening the stock HTC mail app.

I have gone into the App Info for the mail app and tried to "Clear cache" but it doesn't look like it's doing anything.

I have also gone to Settings>Accounts &amp; Sync>Exchange ActiveSync and unchecked Mail in the account that is using it.

I have also tried rebooting my phone.

Any other tips or advice aside from basically wiping the phone? 

Thanks
A bug may have corrupted the app's data. You could try resetting the 'data' portion instead of just the 'cache'. This would essentially make the app reset to factory default (but only that app, not the rest of the phone).

You would have to redo all of your settings, but the important parts (emails) are on the exchange server, so it wouldn't be too difficult to get back to the way things were.