When I try to set my "outgoing" email Adress for the Project, I receive the error Message, that the DKIM-validation failed for this Domain.
I already found this Tutorial and added all entries as described:
https://confluence.atlassian.com/adminjiracloud/configuring-jira-cloud-to-send-emails-on-behalf-of-your-domain-900996548.html
With this Domain-Check tool, I receive the message, that everything is set up fine:
https://domain-check.atlassian.com/
Adding the Mail-Address (as described here) to the Project fails anyway.
One additional hint: When I click on "Mail > Outgoing Mail" like described here (Point 2) I only see a nearly white page. I only see the Headline: "System" and a button on the right "Deactivate Mailout". Nothing else, like it should be, and like it is described in the tutorial I found.
The System is hosted at Atlassian, so no "local"-System misconfiguration can be the reason.
Any suggestions anybody?