The "email" channel is not supported when using Symfony Messenger

Getting this error message?

The "email" channel is not supported.

I was getting the above error and the trace log showed

{
      "namespace": "Symfony\\Component\\Notifier",
      "short_class": "Notifier",
      "class": "Symfony\\Component\\Notifier\\Notifier",
      "type": "->",
      "function": "getChannels",
      "file": "/app/vendor/symfony/notifier/Notifier.php",
      "line": 47,
      "args": [
        [
          "object",
          "App\\Notification\\MyNotification"
        ],
        [
          "object",
          "Symfony\\Component\\Notifier\\Recipient\\NoRecipient"
        ]
      ]
    },

Can you see what it is yet? Yep! - I've not added a recipient to the notification 🤦‍♂️

Originally published at https://chrisshennan.com/blog/the-email-channel-is-not-supported-when-using-symfony-messenger