====== Adding e-mail address ======

  - Log into your ISPConfig instance
  - Log in with your username and password
  - Click on the Email icon on the top bar
  - Select Email Mailbox from left menu
  - Click on Add new Mailbox button (green button)
  - At a minimum:
    - Fill in Email (the part of e-mail address before the @)
    - if you have more than one domain, select the domain name
    - Enter the password twice
  - Optional
    - You can also turn on/off the spam filtering. If you do that, you can also go to Mail Filter tab and tell it to move spam to the Junk directory
  - Click the Save button (green button, bottom right)
  - Test your e-mail account (may take up to 5 minutes for it to populate)
    - Log into webmail (RoundCube)
    - Use your full e-mail address for the username
  - Log out.