Guardrails for Gmail and Google Inbox is a Chrome extension designed to prevent accidental email misdelivery. Developed by Michael Schade, this lightweight browser extension serves as a helpful tool to ensure that your email reaches the intended recipients.

One of the common concerns when sending internal emails is the possibility of mistakenly sending them to individuals outside the company. Guardrails provides a solution to this problem by alerting you when you are about to send an email to people outside your organization or when you mix external contacts with internal ones. This feature helps to minimize the risk of sending sensitive or confidential information to unintended recipients.

Additionally, Guardrails offers peace of mind when communicating solely with individuals within your own organization. By providing a clear indication of the recipients' affiliation, this extension helps to ensure that your email conversations remain within the intended scope.