Brett, That is what the error is indicating, I just cannot seem to determine where the loop is. If I misconfigured the queue, or if it was in RT_Siteconfig. Also it is 4.4.1 on Ubuntu 14.04. I am quite sure it is a misconfiguration on my part but (i tried with RTAddressRegexp configured for the
Dunno if this helps or not, but maybe the bounce is due to it detecting a loop?  [Fri Jan 20 04:29:36 2017] [critical]: RT Received mail (
> ) from itself.