Delete Email from Blackberry and Mail Server at once

First: Login to Blackberry Internet Service for your service provider.

Second: Click "Edit" next to your email account.

Third: Check "Synchronize deleted items between this mailbox and my device".

Fourth: Save.

Change the "Signature" on Your Blackberry Email

First: Login to Blackberry Internet Service for your service provider.
Second: Click "Edit" next to your email account.

Third: Type whatever you want in the "Signature" field.

Fourth: Save.

Stop Getting "Mail Sent" when using Gmail on a Blackberry

First: Login to Blackberry Internet Service for your service provider.

Second: Select 'Filters" for your G-mail account

Third: Choose a filter name - "No Sent Messages" for example.
Select "'From' Field" in the drop-down.
Place "youremailaddress@gmail.com" in the "Contains" box.
Highlight "Do not forward messages to handheld"
Click Add Filter.