How do I set the email address for a Service Desk Project?

[PHC Admin]

I'm 8 hours into what should not take so much time. I set up a new Service Project for a new client, and I was eventually able to add a custom email address to my account, but I can't figure out where I can change the email address associated with the project from the default  @atlassian.com to the email address I spend hours getting to work in my account. Anyone have any idea? The documentation I found doesn't match up with what I'm seeing in the settings section of my project.

[Brant Schroeder]

@PHC Admin Great feedback.  I believe everything is going out on the main address but the reply to email gets set to the service desk email address.

[PHC Admin]

I just realized that the notifications I get show an @atlassian email address as the 'from' but if I hit reply in my email client, they are being sent to the address I set up. So I guess this is working - I think the from should actually show the project's email address, or at least Atlassian should indicate this discrepancy in the documentation.

[PHC Admin]

This is the "Email Requests" screen, where I was able to set up the email (although I understand I'll have to re-do for OAuth at some point, but for now I just would like to get it working. 

https://www.awesomescreenshot.com/image/37710406?key=beccc83cdb878739b02d8682784c8637

This is how the emails are being sent:

https://www.dropbox.com/s/3c45rp8z52apah4/Screenshot%202023-03-06%20063200.png?dl=0

This is the "Outgoing Email" page in my main account settings

https://www.awesomescreenshot.com/image/37710551?key=de014feb655391c6b74e46eb17281412

This is the "Send Email" tab under Settings:
https://www.awesomescreenshot.com/image/37710630?key=c4d6481d4477217ed61eefe7a02683cf

And this is how many different "answers" when I do a Google Search:
https://www.google.com/search?q=how+to+set+service+project+email+address+in+Jira&rlz=1C1CHBF_enUS979US979&oq=how+to+set+service+project+email+address+in+Jira+&aqs=chrome..69i57j33i160j33i160i395l3.18898j1j7&sourceid=chrome&ie=UTF-8#ip=1

And I can't seem to figure this out. 

[Brant Schroeder]

@PHC Admin  Can you share a screenshot of what you are seeing?