The Blog
Hard-won lessons on email verification, inbox placement, and keeping your sender reputation spotless — from the team that's been verifying email since 2000.
How to test email deliverability, spam score and rendering
Test email validation workflows safely with dummy data. Validate your system's logic, reduce false positives, and improve deliverability with real-time.
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Ensure your emails land in inboxes after switching from Sendinblue to SendGrid. Use verified lists and inbox testing to avoid bounces and spam traps.
Test your SendGrid email authentication setup with a real probe message. Ensure SPF and DKIM are correctly configured to improve inbox placement and.
Resolve DKIM selector DNS lookup timeouts by diagnosing DNS records, optimizing TTLs, and validating configurations.
Learn how automated warm-up tools reduce spam triggers and prevent blacklisting during initial sending.
Test email deliverability to free mail providers with corporate gateway strategies. Use real inbox placement tests to verify inbox delivery and avoid spam.
Learn how often to rotate DKIM signatures for optimal deliverability. Reduce spam flags, preserve sender reputation, and improve inbox placement with.
Move beyond average metrics. Use percentile reporting to predict inbox placement, reduce bounces, and improve sender reputation.
Use MailTester’s email verification API to detect and block disposable domains like 10minmail, reducing bounces and protecting sender reputation in 2026.
Use cohort analysis and verification data to predict email list churn, reduce bounces, and improve inbox placement.
Learn how to accurately track email open rates after updating template variables. Avoid false signals, optimize deliverability, and improve engagement.
Discover how email verification software handles transactional vs commercial senders. Cut bounce rates, boost deliverability, and meet ISP policies with.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
