Mailock Free is a secure email product from Beyond Encryption designed for individual light users who need to send sensitive information via encrypted email on an occasional basis. The free tier provides up to 5 secure email sends per month, with unlimited secure replies. Emails are protected with end-to-end encryption, and recipient identity is verified through a Q&A challenge mechanism — recipients must correctly answer a security question before they can access the email content. The product is accessible via two interfaces: - A web application - A Microsoft Outlook add-in Key use cases highlighted include sharing sensitive documents, protecting personal information, preventing email interception, and supporting GDPR compliance expectations. For users requiring more capacity, Beyond Encryption offers a paid upgrade called Mailock Pro, which adds features such as unlimited secure sends, SMS-based challenge authentication, email revocation, advanced auditing, misdirected email protection, extended message expiry (up to 365 days), custom company branding, and shared email access across accounts within an organisation.