Just like WhatsApp or Telegram, Email has its own section on Channels, with a card for every mailbox you connect. You can have several mailboxes at once — for example “Sales” and “Support” — each as an independent instance, with its own assigned agent and its own owners (same multi-channel pattern as Manual 24, section 2).
While a mailbox is Disconnected, no email arrives or goes out through the channel — the card is kept with its configuration intact until you connect it.