Hello Daudi,
Nope, never heard of that mailsystem.
On Plesk itself, I am very new to this myself and I am also interested in the possibilities to integrate other mail solutions (I am specifically interested in MailSite from Rockliffe).
I have no idea hower if there exist such sript based solutions as you describe, nor if there are alternatives like an API (programmer's interface).
I also asked SWsoft if they are consider developing integration with other mail systems and, if not, if this can be done on demand and if they have an idea what that would cost. Haven't gotten an answer, though...
Regards,
Benoit.