You can add an email address to receive a notification when an alert is issued to the email notification channel https://mackerel.io/my/channels#channel=email by using one of the following methods.
- Invite a member to the organization
- Edit the notification channel’s ‘Notification recipients’, select specific users and add a separate address
Members invited to the organization can log in to Mackerel's web console to monitor / check things such as graphs and alerts, but cannot log in with the email address specified as a separate notification recipient in the notification channel.
You can also refer to I want to share my monthly settlement amount with accounting personnel for more information related to adding email recipients for payments.