how to create and add members into a mail "username@domain.atlassian.net" ?

[Redworld]

how to create and add members into a mail "username@domain.atlassian.net" ? and how to restrict mails from outside domain. - Jira cloud

[Fabio Racobaldo _Catworkx_]

Hi @Redworld ,

in order to do that you need to be a Site Admin.

Please try to access admin.atlassian.com  and follow this guide https://support.atlassian.com/user-management/docs/specify-how-users-get-site-access/

For user management : 

Add a few users 

We'll be adding three users: Jason, Kate and Emma. You can add more or choose your own usernames if you like—just remember we'll be referring to these usernames later in the tutorials. You can always disable or delete any users you set up.

If you've logged out of your new Cloud site, log in with the administrator account you created.

1. Go to  > Site administration.
2. Add email addresses for Jason, Kate, and Emma (or your real teammates).
   • Separate the email addresses with commas to invite multiple users.
   • If you're testing and your team uses Gmail, you can use email aliases like "myemail+jason@atlassian.com" and "myemail+kate@atlassian.com" to send the invitations to yourself.
   • You'll also have the option of allowing any user with that email domain to join your site without being invited. See Specify how users get site access for more information.
3. Select the products from the Application access list that they should have access to. In this case, at least choose Jira Core. You can always change this later.
4. Click Invite users.

For domain management :

Approved domains

You can approve domains to allow users to access your site quickly. New users who join with an approved domain are granted default product access.

You might want to use this to:

1. Approve your company domain so onboarding is easier for your employees.

2. Approve client domains so they can always get access.

To manage approved domains:

1. Go to your site's Admin at admin.atlassian.com. If you're an admin for multiple sites or an organization admin, click the site's name and URL to open the Admin for that site.

2. Select Site access > Approved domains.

3. Choose from the following options:

   • Approve any domain – Any user will be able to sign up and access your site.

   • Approve the following domains – Manually define which domains are approved.

   • Don't approve any domain – All users will be forced to request access or be invited.

4. Click Save changes.

Users on approved domains:

• Must create an Atlassian account before logging in to your site.

• Can access your site from an available Join site button.

• Can access your site with or without an invitation.

With the Email site administrators when a new user gets access to the site checkbox, you can also choose whether site admins should receive an email when a new account gets access.

[Redworld]

Hi @Fabio Racobaldo _Catworkx_ 
Thanks for the replay.

Actually my exact requirement is different. if we have a mail like "jira@domain.atlassian.net", how to add few users to this mail group. I mean mails to this group should deliver to the members in this group.  Could you please help ?