It was a configuration error at our ISPs temporary backup mailserver for a few hours after we changed DNS to have an MX record for the ISPs mailserver. After their correction was made, then mail could be delivered to their machine and stored for later delivery to us.
Now that our internet connection is back up, the stored mail got delivered to us and we no longer have that temporary MX in our DNS zone.
While the primary fast internet service was down, then only web service was provided through our backup frac T1. So Club mail was delayed until after microwave service was restored.
Our service comes from the tallest building downtown, and the antenna blew over. The security people of the building wouldn't let repairmen on the roof in the high winds and rains.
Our security consciousness is expressed in different, tested ways