When configuring the user access settings to allow approved domains to access a site, admins will receive the following notification:

<User name> has joined yoursite
Hi <Admin name>,

<User name> (user@domain.com) has just joined https://yoursite.atlassian.net in yoursite. They have access to the following products:

Jira Service Management
Jira Software

View <User name> profile

If something doesn’t look right, review your user access settings.
Cheers,
The Atlassians

This message was sent to you by Atlassian Cloud
You are receiving this email because you are a listed administrator of yoursite.

It would be great if admins could have the ability to edit the subject and further details of the notification.