The document provides 7 steps to digitally sign an email: 1) Obtain a free email certificate from Comodo, 2) Complete an online form to receive a download link for the certificate, 3) Add the Comodo trust CA to the browser, 4) Import the certificate into the computer, 5) Enable POP access in Gmail, 6) Configure the Gmail account in Outlook, 7) Send a digitally signed email. Following these steps will allow one to digitally sign and send an email.