We have noticed that since upgrading to 8.0.2, messages that are set to be delayed delivery are never sent if they are addressed to a user within the same domain.

The messages are sent if they are destined for an outside address (e.g. gmail).

If a message is addressed to users on the same domain and outside addresses, only the outside address receives the message.

I have checked the wpgate/gwia/gwhold directory, and there is no message placed there for locally addressed messages, however there is a message in that directory if at least 1 recipient is an outside address.

Where do I look to troubleshoot this?