Since version 1.2.0 FMail2 supports Hook and Hookmark via a RFC-5322 compliant message id. The advantage of the use of the RFC-5322 specification is that the Hook links you make in FMail2 also work from other email clients (that support Hook, such as Apple Mail) and vice versa. So you are not 'hooked' the FMail2.
The Hook developer has included the necessary scripts by default. You have to select FMail2 as the application to open the email links (step 8 below).
In case there is a problem, here are the steps needed for using Hook and Hookmark with FMail2.
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