Delete email on your smartphone and in your email
application on your computer
You can set the Delete On option for each email address that is associated with your BlackBerry smartphone.
On the home screen, click the Messages icon.
key > Options > Email Reconciliation.
If the Message Services field appears, set this field to the appropriate email account.
Change the Delete On field to Mailbox & Handheld.
key > Save.
It takes a short period of time for email to be deleted over the wireless network.
Delete a message,