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.
Deliverability testing inside your ESP, CRM and sending platform
Secure your email list during a move from another ESP to SparkPost Bird. Verify every address with 98.9% accuracy and avoid bounces, spam traps, and.
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Learn whether Microsoft SNDS tracks domain reputation or just IP reputation. Understand the limits of SNDS and how to verify domains effectively with.
Re-warm your IP after a data breach or spam incident with proven steps. Reduce bounces, avoid blocklists, and restore sender reputation.
Learn if using bounce.example.com as your return-path is safe. Discover the real rules, risks, and best practices for email deliverability in 2026.
Discover how to trace a Microsoft SNDS trap hit to the responsible campaign. Use real-time verification and inbox testing to diagnose and fix.
Benchmark your Outlook complaint volume against Microsoft JMRP standards. Measure spam complaints, improve sender reputation, and reduce deliverability.
Boost your business email deliverability to iCloud Mail with proven techniques. Clean your list, verify addresses, and test inbox placement before.
Compare Amazon SES vs SendGrid support quality for deliverability issues. Learn how real-time verification and inbox testing help prevent bounces and.
Automate compliance reporting with step-by-step instructions to export Postmaster Tools v2 data to CSV for weekly reviews.
Discover how Yahoo Mail’s spam thresholds impact bulk email delivery and how to verify your list before sending.
Stop external emails from Microsoft 365 landing in junk. Learn how sender reputation, DKIM, and list hygiene impact inbox placement — and how to verify.
Learn how IP pool failover works when one pool is blocklisted. Reduce bounce rates and protect sender reputation with real-time verification and inbox.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
