How can I use PostmasterFollowUpSearchInReferences with other information then Ticket ID ?
Use Case: We want to use monitoring system (zenoss) to create incident tickets in OTRS and then close this ticket automatically with email coming from monitoring system - if service is up - and incident will closed.

In the first step we are processing incomming email with procmail write Event ID from monitoring system to the reference field.

Second step: After this otrs waiting for the email with the same reference - Event ID - based on we want dont create new ticket, but attach closure email to the first email as article (based on reference field - event ID) and set first ticket closed (based on body "state: clear" phrase).

I dont understand exactly how can I achieve the last step. Is it possibe this setup in the postmaster gui ?