I made a couple of commits to the zorg repo today, and reviews.llvm.org
sent me mail like the following for each commit:
Your email to Phabricator was not processed, because an error occurred while
trying to handle it:
Phabricator can not process this mail because no application knows how to
handle it. Check that the address you sent it to is correct.
(No concrete, enabled subclass of PhabricatorMailReceiver can accept this
I'm guessing this is a configuration issue in phabricator.