- login to your server email account via cPanel or webmail
- select Squirrel Mail webmail email client
- select show all
- select "select all"
- deselect emails that you want to keep
- click on delete
- click on 'check for new mail' to refresh the screen
- click on PURGE next to the trash folder
If your email account on your PC or tablet etc is set up as an IMAP account, this means when you delete emails off the server it will also delete it off your own device/s.
All emails are now deleted that was selected in your inbox & in your trash box