Cannot read property 'publicKey' of null
Solved
Support
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on one of my installation of Cloudron, the mail service is down (red bullet) and when I restart it I get the error:
Cannot read property 'publicKey' of null
it must be a problem with DKIM as indicated here
https://docs.cloudron.io/troubleshooting/#dkim
but I don't understand because it was working I think -
Got this sorted out in support@ . Many releases ago, we had an issue that the mail domain was not created properly when a domain was added. These mail domains were not correctly initialized and as a result are failing now after 7.0.3 update. Re-generating dkim keys by hand fixes it.