While perusing the wiki looking for answers, I found a little snippet
of information missing in the messaging explanation. Just one more way
that the outgoing message from the i-gate can get buggered up.
The i-gate operator configures the outgoing path used by packets being
sent from the i-gate. If the user expecting messages from the i-gate
is further away from the i-gate than the outgoing path, then there's
another possible disconnect.