Gmail Sender Info is a free Chrome extension designed to enhance email security by displaying sender domain information and logos directly in your Gmail interface. This tool allows users to verify the authenticity of email senders before engaging with their content. By simply hovering over an inbox row, users can view the sender's domain and logo, while opening an email reveals a comprehensive security breakdown with SPF, DKIM, and DMARC results. The extension provides clear trust verdicts, indicating whether an email is trusted, requires caution, or is not trusted, making it easier to detect potential phishing attempts.

This open-source extension prioritizes privacy and transparency, requiring minimal permissions and ensuring no data is sent to third-party services. It utilizes Google's own DNS and favicon services for lookups and reads email headers within the existing Gmail session, eliminating the need for additional permissions. Ideal for security-conscious users, IT professionals, and anyone looking to enhance their email experience, Gmail Sender Info offers a straightforward setup with zero configuration required.