Can't delete mail in my Trash folder in Evolution mail, get error "Summary and Folder mismatch"

First create a backup of your mail using Evolution by clicking on File->Backup Settings “This step is vitally important to prevent data loss”

By using your file browser browse to the following directory**/home/YOURUSERNAME/.evolution/mail/local**

Once in the local folder delete all files with the following extensions. _**.index .cmeta .ev-summary

**_Very important to not delete the files with the .data extension

Restart Evolution

Evolution will now attempt to re-create all indexes

You should be able to delete the mails in the trash folder