Can you please explain bit more on your requirement. i.e. when you want the notifications (like when new ticket created, edited etc.), is the email address as same as your jira account etc.
To use a custom email with your domain, your organization admins must add it from admin.atlassian.com. Alternatively, you may customize the prefix of the default email.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.