Job handler classes allow customizers to modify the synchronization logic. Thus, post processes such as automatic service message generation from emails in a service post box can be realized.
In the administrator table Administration/Data exchange/Groupware/Job Handler Classes, a Java class can be entered for each job type that implements the handler interface. You may also want to take a look at the Java-Interface de.pisa.psa.syn.gwc.IJobHdl.