I took a look at the message you posted and I would recommend putting in a ticket with the Cloud team so they can help you on the backend. Once you get a response from the Support team please include the resolution here so the rest of the community can benefit.
I confess I haven’t actually tried this but https://confluence.atlassian.com/adminjiracloud/configuring-jira-cloud-to-send-emails-on-behalf-of-your-domain-900996548.html implies it should be possible.
Reasoning: My understanding of JIRA server is that JSD uses the same mechanism to send as JIRA itself so I would make the strong assumption that the cloud product behaves similarly.
I wasn’t aware of this either until 30 minutes ago and it has been the showstopper why we didn’t want to move from server to cloud. Perhaps time to move that project ahead.... 8)
...be more productive while being fun to use at the same time. For some, getting started can be a bit intimidating. This is especially true if Jira Service Desk is your first exposure to Atlassian...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs