To learn more about Triggered Emails, see:
Before using emailContact() or emailMember(), you must set up at least 1 Triggered Email.
Notes:
Triggered Emails are included in the Email Marketing quota. However, similar to automations, Triggered Emails will continue to be sent without interruption even if you reach your quota.
The statistics for Triggered Emails are based on every time an email is sent, including test emails that you send to yourself. This is different from the statistics for Email Marketing that are based on emails sent to unique contacts. Therefore, the statistics for Triggered Emails may seem inflated compared to Email Marketing statistics.