How to Delete a Page of Items at Once in GroupWise 7 Webaccess

Click on the folder you want to delete the items from (Mailbox, Sent Items, etc)

Then click the select all/clear all checkbox, circled in red below. 
This will place a checkmark in front of every email on that page.

Then click to delete the emails.

Remember, once emails are deleted they will remain in your Trash for 7 days.  After the 7 days, the system will
automatically delete them.

If you are over your quota limits, you will need to empty your trash to remove the items completely from your mailbox.