Mailtrap is a professional email testing platform that provides a secure virtual SMTP sandbox to capture dev environment emails, preventing accidental sending to real recipients and helping teams debug email delivery.
Founded in 2015 in London, UK, Mailosaur is an automated email and SMS testing platform for developers. It provides dedicated test inboxes, Spam Score analysis, HTML/CSS rendering validation, and API integration to automate email and SMS verification in CI/CD pipelines.
Mail Tester is a free online email scoring tool. Send a test email to get a 0-10 quality report covering SPF/DKIM/DMARC configuration, blacklist status, spam keyword detection, and HTML content analysis.