BTW, for quick scanning in the inbox, it would be cool if we could adjust the subject line. Now it is either:
Deployment back to normal at instance: Periodic build Ironwood (periodic-builds-ironwood.opencraft.hosting)
Deployment failed at instance: Periodic build Ironwood (periodic-builds-ironwood.opencraft.hosting)
Better would be to shorten the subject and move the important information closer to the front:
Deploy Ironwood CI: Passed
Deploy Ironwood CI: Failed
No need for “back to normal”, especially since if it always passes it will always say back to normal.