Domain Age Checker is a Chrome extension designed to enhance email security for Gmail and Google Groups users. It provides instant visibility into the age of email sender domains, helping users identify potential scams and phishing attempts. The tool automatically adds color-coded badges next to sender email addresses, indicating whether a domain is fresh, medium-aged, or established. This allows users to make informed decisions before engaging with new contacts.

Key features include universal support across Gmail and Google Groups, public email detection, and one-click vetting of domains. The extension operates entirely on-device, ensuring user privacy with no data collection. The traffic light system simplifies the risk assessment process, categorizing domains based on their registration age. This makes the Domain Age Checker an essential tool for logistics coordinators, sales teams, and anyone managing high volumes of email communications.