Mezmo change history: Email Alerts Are Not Being Sent

Mezmo reported a major email-alerting outage starting 2021-10-06 21:29 UTC, lasting 1 h 5 min and resolving at 2021-10-06 22:35 UTC; Slack and webhook alerts remained functional. The postmortem attributed partial email-notification disruption to exceeding its email provider’s daily limit of 250,000 messages; email alerting was restored.