Signing email

Hello,

I have installed GNU Privacy Guard on my Slackware system.
How do I sign with my key for all the email that I send using mutt?

Thank you in advance for any help.

Subba Rao
subba9@cablespeed.com
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Old American Wild West saying:       God created men but Colt made them equal.
Today:                  Linus created Linux and Linux made IT companies equal.