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.
Email deliverability fundamentals and best practices
Ensure reliable email delivery by configuring dual stack routing for IPv4 and IPv6. Test inbox placement and reduce bounce rates with MailTester’s.
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Improve inbox placement with the right cold email send time. Use timezone logic and spam filter rules to boost deliverability and engagement in 2026.
Integrate email verification into your CI pipeline to catch invalid addresses early. Reduce bounces, protect sender reputation, and improve inbox.
Clean your HubSpot meeting scheduler list with real-time email verification. Reduce bounces, improve outreach success, and boost inbox placement.
Discover why DMARC alignment breaks with forwarded emails and how to fix it. Verify addresses with MailTester to prevent bounces and deliverability loss.
Verify millions of email addresses fast and accurately with MailTester's bulk verification and real-time API.
Prevent bounces, boost deliverability, and protect sender reputation. Learn how to verify emails before launching high-volume seasonal campaigns with.
Learn how to identify bot clicks in email analytics and filter out security gateway activity that skews engagement metrics.
Fix inbox placement issues caused by alumni email forwarding. Verify addresses, test deliverability, and eliminate bounces with precise tools.
Prevent email loops in SMTP servers with proven best practices. Use real-time verification, catch-all detection, and list hygiene to reduce bounces and.
Stay compliant with France's CNIL B2B cold email laws using legitimate interest. Verify your prospecting list with MailTester to reduce bounces and avoid.
Stop risking your sender reputation. Learn why SPF +all and ?all are dangerous, how they break email authentication, and how MailTester’s verification API.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
