Best Email Testing Tools for Microsoft 365

dmarcian, a global B Corp that is self-funded and funded by the public, is dedicated to improving all email systems around the world by making DMARC available to everyone. Our platform allows users to deploy DMARC, visualize email delivery data, and manage long-term domains. With superior tools, educational resources, expert support, and superior tooling, we help domain owners of all sizes fight email compromise, phishing, and spoofing.

Capture SMTP traffic in staging and dev environments. Flexible API allows you to automate test scenarios and flow. Validate HTML/CSS and analyze email content for spam scores. Each Mailtrap account comes equipped with a unique testing environment. It takes just a few steps to integrate it with your app. You can create individual inboxes to support different environments, review servers, and then group them into the appropriate projects. Our API is easy to use and allows you to quickly set up automated testing using unlimited API calls. View messages, check spam scores and validate headers. You can also analyze the HTML support across all email clients. Access your inboxes to clients or colleagues. Send selected test email to whitelisted recipients. Mailtrap can be sent directly from your CRM or email send service. Simulate sending emails to multiple recipients.