Free email deliverability test: forward any email for instant SPF, DKIM, DMARC analysis and AI content optimization.
MailTester.ai is a free email deliverability testing tool that analyzes SPF, DKIM, DMARC, and content quality. Users forward any email to a unique address and receive a comprehensive report with spam score, AI-powered content suggestions, and technical fixes. It helps marketers improve inbox placement and open rates by identifying spam triggers and optimizing subject lines.
Key Features
check_circleSPF/DKIM/DMARC validation
check_circleAI content rewriting
check_circleSubject line optimization
check_circleSpamAssassin scoring
check_circleSpam trigger detection
check_circleInbox placement prediction
check_circleTechnical headers review
check_circleActionable recommendations
check_circleImage-to-text ratio check
check_circleLink reputation check
Use Cases
lightbulbEmail marketers forward a newsletter from Mailchimp to get a spam score and AI rewrite suggestions, reducing spam folder placement by 47%.
lightbulbSmall business owners test promotional emails before sending to subscribers, ensuring high inbox delivery and avoiding spam filters.
lightbulbContent creators analyze subject lines and body content for trigger words, improving open rates by 3.2x with AI-optimized phrasing.
lightbulbAgencies validate client email campaigns across multiple platforms, providing comprehensive technical and content reports to boost deliverability.
lightbulbE-commerce managers check transactional emails for authentication issues, fixing missing DMARC policies to prevent order confirmations from landing in spam.
lightbulbFreelancers use the tool to test emails from Substack or ConvertKit, receiving step-by-step fixes for DNS records and content improvements.
lightbulbMarketing teams compare before/after AI optimization results, demonstrating a 156% improvement in inbox placement to stakeholders.
email deliverabilityspam scoreSPFDKIMDMARCAI content rewritingsubject line optimizationSpamAssassinemail testinginbox placement
