[4]
  [3] Usr: Hey Robot! Let's do some GMail.
    [3] Bot: Sure. What's the email address?
      [2] Usr: bla.x@gmail.com
        [1] [Bot sets email address to "bla.x@gmail.com".]
          [1] [good]
        [1] [Bot sets email address to "abc@gmail.com".]
          [1] [bad]
      [1] Usr: abc@gmail.com
        [1] [Bot sets email address to "abc@gmail.com".]
          [1] Bot: Alrighty. Please enter the password.
            [1] [Bot starts password saver.]
              [1] [Bot runs inbox counter. => 123]
                [1] Bot: OK, I think you have 123 mails in the inbox.
                  [1] [good]
  [1] Usr: let's do gmail
    [1] Bot: Sure. What's the email address?
      [1] [...]
        [1] [good]