System emails, including those sent by servers such as cron tasks, error alerts, and user accounts, are critical but often neglected. These emails can be difficult to manage due to their low volume and limited visibility, leading to potential problems if they fail to arrive or are not properly delivered. To address this issue, it's recommended to use purpose-built products like Bugsnag, Honeybadger, Sentry, Raygun, and New Relic for error reporting, and to relay system emails through a reliable service like Postmark or an alternative alerting system. Additionally, using DMARC policies can help identify the sources of email for your domain and ensure proper authentication and delivery. It's essential to handle these critical system emails with care and attention to prevent potential failures and catastrophic consequences.