CRM/Mailing/EventMailingEventConfirmcivicrm_mailing_event_confirmTracks when a subscription event is confirmed by emailtrueCiviMail id int unsigned true ID Number id true event_subscribe_id int unsigned true FK to civicrm_mailing_event_subscribe Mailing Subscribe event_subscribe_id civicrm_mailing_event_subscribe id CASCADE time_stamp timestamp CURRENT_TIMESTAMP true When this confirmation event occurred.