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.
Sender reputation, IP warm-up and sending infrastructure
Plan a 1M-per-day warm-up strategy during large ESP migration. Reduce bounce rates, avoid blacklists, and preserve sender reputation with real-time email.
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Understand what your Smartlead email health score actually measures. Learn how verification tools like MailTester improve inbox placement and reduce.
Understand Microsoft 365 outbound spam policy limits for admins in 2026. Prevent delivery failures and improve inbox placement with real-time verification.
Learn how DKIM signing domain vs From domain affects email reputation and inbox placement. Improve deliverability with precise verification and real-time.
Ensure your Salesforce Marketing Cloud emails pass DMARC alignment. Use real-time verification and inbox placement testing to fix authentication failures.
Compare real plain text vs HTML cold email reply rates. Use verified data to boost response rates.
Discover why ESP click tracking domains mimic shorteners and how this impacts deliverability, sender reputation, and inbox placement — with real fixes via.
Make the right Amazon SES IP choice for your startup. Use this decision tree to avoid deliverability issues and improve inbox placement.
Test email inbox placement with SendGrid, Postmark, and SES sandbox. Validate deliverability before sending at scale with real-world testing.
Compare how adding a text part affects your email spam score. Use real inbox-placement testing to measure deliverability impact and avoid filtering.
Discover the top reasons your emails get a spam score of 10—plus how to fix them with real verification tools and inbox placement tests.
Discover whether BIMI or a brand logo actually affects email tab placement. Learn the truths behind inbox appearance, deliverability myths, and how.
Stay sharp
Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.
