E-mail filter - execute script

[lachyn]

Hello all,
I need some expert advice how to create the rule for incoming e-mails, which will execute a small Perl script (to send out SMS notification) everytime it matches the rule.

I have perl script for sending these notifications prepared, but I dont know how, and where to implement the e-mail rule in my ispCP mail configuration (RC2+Maia) to execute this script.

Filter have to be configured probably in MDA but I am noob in ths stuff and I need somebody who can point me to the right configuration of it to do the things I expect.

Thanks a lot