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 verification and list hygiene for deliverability
Learn precise, actionable best practices for content encoding in transactional email verification to reduce bounces and improve inbox placement.
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Understand Google Workspace's hourly sending limits per rolling window and avoid bounces. Verify your list with MailTester's 98.9% accurate email.
Compare Postmark SpamCheck API with self-hosted SpamAssassin. See real trade-offs in accuracy, cost, setup, and deliverability.
Remove false positive clicks from Microsoft Defender in your email analytics. Improve CTR accuracy and reporting reliability with real verification and.
Find inactive and out-of-office email addresses with verification software that scans for common OOO message keywords.
Secure your domain with the right np tag in DMARC for missing subdomains. Prevent spoofing, reduce bounces, and improve inbox placement using verified.
Stop chasing outdated email delivery rules. Learn what truly impacts sender reputation with real-world data and actionable insights to improve inbox.
Find the real average cost of verifying 100,000 cold email addresses. Understand pricing models, avoid wasted sends, and reduce bounce rates with accurate.
Prove ROI to your CMO with real data on deliverability, bounce rates, and list hygiene. Learn how MailTester reduces waste and improves campaign.
Solve email deliverability challenges for Chinese mainland users with proven verification and testing strategies.
Monitor DMARC across many client domains with precision. Reduce spoofing risks, improve sender reputation, and streamline inbox placement — all from one.
Ensure your email list accuracy by verifying temporary aliases from Apple Hide My Email. Reduce bounces and improve deliverability with MailTester’s 98.9%.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
