Update from Postmark: We've deployed additional fixes and latency/errors have returned to normal performance. Engineering will continue to monitor into the evening for consistent results.

Update from Postmark: We've confirmed the source of the issue and are implementing fixes. Latency and errors has been reduced but engineers are continuing to remedy the issue.

Postmark has notified us of some latency issues on their API again. Message delivery may be delayed, but no messages are being lost.