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From version 1.7.2, JEMH has the ability to allow scripted decision logic at the Template level on whether or not a given notification should be sent by using the $jemhUtils.setInhibitSending(boolean) method. The script itself can be as simple or complex as you need.
/wiki/spaces/JEMH/pages/2850840 are the raw Velocity mark-up content for email notifications. For more information on what Velocity is and how it is used, see the official user guide here.
Project Mapping Solution
If you do not want to customize templates, it is possible to add inhibition logic at the ProjectMapping config level, see:
The Velocity Context
The usual velocity context references are available to help you script your decision logic, there is also a helper class available $jemhUtils , see the API link below for additional methods available:
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