Sending administrator notice to overquota users

==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): PGSQL
- Linux/BSD distribution name and version: CentOS 6.4
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Greets,

Is there a way for the administrator to send notices/email to users who are overquota? 

We need to do this via our automation/accounting systems, so it cannot be done manually via any web interface.  So I basically need a method to deliver an email bypassing the overquota checks.

Thanks