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.
Inbox placement by mailbox provider: Gmail, Outlook, Yahoo and spam filters
Discover how message threading impacts inbox placement in Gmail and Outlook. Learn how to maintain sender reputation and avoid filtering with real.
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Stop inbox placement failures with cross-border email verification. Clean your list, reduce bounces, and improve deliverability across regions using.
Determine the recommended frequency for email deliverability health reports to reduce bounces, improve inbox placement, and maintain sender reputation.
Measure inbox placement and sender reputation changes after infrastructure shifts. Use real-time verification and testing to act fast on deliverability.
Why your Gmail spam rate stays high after stopping sends. Learn how email verification fixes inbox placement and reduces spam complaints.
Fix DKIM signature failures caused by gateway-added footers. Learn why footers break DKIM, how to verify email integrity, and use MailTester to prevent.
Find out how to test if remote images are blocked in your email campaigns. Use real inbox testing to see image rendering across major providers.
Discover how DKIM2 improvements enhance email security by detecting and preventing replay attacks.
Test email deliverability in real-world conditions using verified audience data. Reduce bounces, avoid spam traps, and improve inbox placement with proven.
Compare MXToolbox and Google Admin Toolbox header analyzers. Understand their limits, see real-world use cases, and discover a better solution for inbox.
Compare DMARC p=none vs quarantine for cold outreach. Learn how each policy affects deliverability, sender reputation, and inbox placement.
Ensure email list accuracy when using CDNs with strict transport policies. Use real-time validation and inbox testing to reduce bounces and improve.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
