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
Understand what SPF record soft-fail means for deliverability. Prevent bounces, avoid spam filters, and improve inbox placement with clear, actionable.
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Stop email delivery failures caused by SPF include directive DNS timeouts. Diagnose and fix them with proven steps and real-time verification tools.
Discover how open rates, click-throughs, and engagement signals impact Bayesian spam scoring in SpamAssassin.
Compare SendGrid deliverability challenges with Postmark’s performance. Diagnose bounce rates, spam filters, and sender reputation with real-time inbox.
Improve email deliverability with proven DKIM selector fallback strategies. Avoid bounces, maintain sender reputation, and ensure consistent.
Secure your Gohighlevel email senders with proper DKIM setup. Prevent spam, boost inbox placement, and verify deliverability with MailTester’s real-time.
Verify unsubscribe link functionality to improve email deliverability, reduce bounces, and maintain sender reputation. Use real-time inbox testing today.
Fix poor email deliverability caused by low-quality lists. Use real-time verification, inbox testing, and list hygiene to boost inbox placement and sender.
Discover how outdated SPFRule versioning causes email validation failures. Learn to verify email lists accurately with real-time checks and reliable.
Check if your sending IP is on a major email blocklist. Use real-time tools to diagnose deliverability issues and fix them before your emails are marked.
Add Cloudmark and Proofpoint reputation data to your SMTP verification process. Reduce spam risk and boost inbox placement with real-time insights.
Analyze the real costs of email infrastructure with dedicated vs shared sending addresses. Cut bounce rates, protect sender reputation, and improve inbox.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
