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 why predictive inbox placement models miss critical ISP-specific rules and how real-time verification with MailTester improves deliverability.
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Learn how to analyze hop timings in email Received headers to diagnose deliverability issues and improve inbox placement.
Ensure inbox placement and sender reputation with continuous email record validation. Reduce bounces, avoid spam traps, and maintain deliverability across.
Stop misleading open rates caused by image prefetching. Learn how to verify email lists and detect phantom opens with real-time validation and inbox.
Ensure legal and deliverable email marketing in Brazil with accurate, compliant verification. Reduce bounces and protect sender reputation with.
Learn how the SPF 'all' mechanism causes delivery failures across domains. Fix it with precise email verification and inbox placement testing.
Find and remove hidden tracking domains in email templates before sending. Improve privacy, avoid spam filters, and protect your sender reputation with.
Improve inbox placement and engagement with automated email sending that respects timezones and mimics natural user behavior. Verify your list first.
Resolve MTA-STS and DANE policy conflicts affecting email deliverability. Use real-time verification and inbox testing to prevent bounces and ensure inbox.
Discover how DNS cache poisoning can exploit SPF include mechanisms in third-party email verification systems.
Learn how to accurately track click-through rates from embedded signature images in one-to-one emails—without relying on misleading links or broken.
Monitor transactional email feedback loops in Zoho ZeptoMail with MailTester. Reduce bounces, improve inbox placement, and maintain sender reputation with.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
