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.
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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.