No emails sent. Maybe because:

• Not using Bamboo.LocalAdapter. Make sure you have your mailer configured to use Bamboo.LocalAdapter or the emails will not show up here.
• You recently restarted your server. The viewer does not persist emails so whenever you restart the server the list will be cleared.
• You're running multiple OS-level BEAM processes. Sent emails are stored in memory. If you have more than one OS-level process running, like "mix phx.server" in one terminal and "iex -S mix" in another, emails sent in the latter won't be visible in the former.