imap1.us.opalstack.com is currently offline for scheduled maintenance. We'll update this post when the server is back online.
The resolution of this issue is being delayed by an unfortunately-timed outage in our upstream provider's management systems. We do regret the extended downtime and are doing everything possible to restore service as soon as possible.
The data center team is still working to bring the server back online.
The server still has not come back online, the data center team is investigating.
The server is presently rebooting and should be back online soon.