Change the customer e-mail address

 At the moment, we can't set an ETA for this feature to be released, since there's a number of factors that determine how our product team prioritizes new features. Consider adding yourself as a watcher to be kept informed as to the state of this feature request moving forward. With that way, if our development team updates the ticket, you'll be notified via email.
You can learn more by reading Implementation of New Features Policy.

Although we understand the value of this feature, we do not have a short term timeline for its delivery. The main reason for this is there are dependent projects that need to be completed first.

I recently published a blog looking at our customer management vision https://community.atlassian.com/t5/Jira-Service-Management-articles/Choosing-the-right-approach-to-Customer-Management-in-Jira/ba-p/1970761. I hope to be in a position to prioritise this feature in the next horizon of this vision. It is definitely amongst the top requirements for External Customers.

I will update again at the end of the year, or if anything changes.