How do I get rid of the 'Sent from my BlackBerry' message on sent emails.

I have a BlackBerry and every time I send a message it adds a note to the bottom that it was sent from my blackberry.  I don't wan't people to necessarily know that, nor do I think they care.  How can I get rid of it?

You need to login to your BIS account (via your carriers BIS website or from your company) and choose the email account you want to edit the signature option for. Click the "Edit" option next to that email and you should see all the fields for your account pop up, go to the Signature field, and you'll notice that message, you can delete it or add a better message. Click save and your done.

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Other BIS Sites are mentioned in this Bright Hub article.