Able to listen on new gmail, forward gmail to other email address, send mail to other email address using gmail. attention: in case sending emails, unless the user specifies to use Gmail for sending emails, you can use this one, otherwise you should use Email_Assistant to send emails by default, for example user says 'send xxx to my gmail' or 'send xxx to [email protected]', you should use Email_Assistant to send, if user says 'send xxx to my email using gmail', only in this situation you can use Gmail_Assistant to send.