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 deliverability fundamentals and best practices
Improve inbox placement and sender reputation by separating transactional and marketing emails onto different IP pools.
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Compare how Amazon SES and SendGrid handle bounces and complaints—what they track, how they react, and how to fix issues early.
Understand SparkPost Bird IP pool types and shared dedicated auto options. Improve deliverability with real-time verification and inbox placement testing.
Ensure your cold outreach lands in the inbox. Use real-time verification to confirm delivery and avoid wasted efforts. Test your emails before sending.
Determine acceptable bounce and complaint thresholds when warming up 100K emails per day. Use real-time verification to prevent spam traps, reduce.
Compare Postmark and Mailgun message streams and domain setup. Learn how to optimize sending, avoid bounces, and improve inbox placement with real email.
Ensure your emails reach inboxes with secure gateway warm-up for Proofpoint and Mimecast. Use real-time verification and deliverability testing to reduce.
Use email verification to reduce spam flags, avoid hard bounces, and improve inbox placement with real-time checks and deliverability testing.
If your 10K per day warm-up causes bounce spikes, act fast. Diagnose invalid emails, test inbox placement, and avoid spam traps with MailTester’s.
Learn whether Return-Path must match From address for SPF alignment. Understand DMARC compliance, authentication mechanics, and how to fix deliverability.
Learn exactly how to sign up for Microsoft SNDS and verify IP ownership with our step-by-step guide.
Check custom return-path CNAME propagation time and verify DNS settings with accurate real-time tools. Avoid delivery delays and bounces now.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
