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 authentication: SPF, DKIM, DMARC, BIMI and MTA-STS
Ensure email deliverability by monitoring SPF records across tenant domains in ESP platforms. Prevent bounces and protect sender reputation with real-time.
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Discover how misconfigured CNAMEs on email verification subdomains can harm deliverability. Learn to audit, fix, and prevent risks with real-world checks.
Detect email authentication delays in real time using SMTP log analysis. Improve deliverability and sender reputation with precise timing insights.
Improve email deliverability with a platform that adjusts send times based on global timezone spread—reduce bounces and boost inbox placement today.
Diagnose email deliverability issues caused by SPF sensitivity to DNSSEC validation delays. Use real-time verification to catch problems before they hurt.
Discover why DKIM signatures pass in testing but fail in real-world email clients. Learn the root causes and how to verify them with real inbox testing.
Compare Rspamd score thresholds and SpamAssassin standards for email deliverability. Learn when to adjust your spam score settings and how verification.
Fix inbox delivery by understanding SPF soft failures and the permit fallback. Use real-time verification to catch issues before sending.
Use a real-time MX record lookup tool to diagnose email delivery failures. Check DNS records, resolve routing issues, and improve inbox placement.
Resolve recurring email loop errors in automated platforms with precise verification tools. Prevent bounces, improve deliverability, and maintain sender.
Learn how the DKIM selector fallback mechanism improves deliverability for high-volume email sending.
Stop email deliverability issues caused by 4.4.2 connection drops mid-transaction. Learn the root causes, real-world fixes, and how to test.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
