If you'd like to remove some messages via webmail, login to webmail and go to your inbox, you should see a list of all mail in your inbox:
1. Place a checkbox next to the message(s) you'd like to delete
2. At the bottom of the page, click the SET button next to the "Deleted" tag
3. The messages you wish to delete will now have a red deleted indicator next to themur
4. Click "Purge Deleted" at the bottom of the page.
