Blog
Email Deliverability Guides & Best Practices
Guides, best practices, and intelligence from the InboxEagle team to help you land in the inbox every time.
Authentication4 min
Email Deliverability Checklist: 30 Pre-Send Checks
A complete pre-send checklist covering authentication, sender reputation, list hygiene, content, and monitoring — updated for 2026 enforcement requirements.
Gmail6 min
How Email Spam Filters Work: What ISPs Check Before Delivering Your Email
A technical but accessible explanation of how Gmail, Outlook, and Yahoo decide whether your email reaches the inbox or the spam folder.
Analytics5 min
How AI Monitors Email Deliverability: What's Actually Different
AI-powered deliverability monitoring alerts you within a minute of Google publishing data, identifies root causes, and generates action plans — here's exactly how it works differently from traditional dashboards.
Analytics5 min
What Is a Good Inbox Placement Rate? 2026 Benchmarks
Industry benchmarks for inbox placement rates across eCommerce, SaaS, and B2B — and what to do if yours falls short.
Analytics8 min
Inbox Placement vs. Delivery Rate: Know the Difference
Your ESP says 99% delivered. But how much of that mail actually reached the inbox? The difference between delivery rate and inbox placement rate — and why it matters enormously for revenue.
Analytics8 min
Why Your Email Open Rate Is Lying to You (And What to Track Instead)
Apple Mail Privacy Protection and security scanner pre-fetching have made open rate an unreliable metric. Here's what's happening, why high open rates can be a warning sign, and what to measure instead.
Automation8 min
Why Your Welcome Series Is the Most Dangerous Flow for Sender Reputation
Open rates look great in week one — but your domain reputation may already be tanking. Here's what's really happening inside your welcome series and how to fix it.
Automation8 min
Win-Back Campaigns: The Right Way to Re-engage Without Destroying Your Reputation
Most win-back campaigns are run wrong — mailing too many inactive subscribers, skipping seed tests, and never actually sunsetting non-responders. Here's how to do it correctly.
E-commerce5 min
Managing Email Sender Reputation During E-commerce Volume Spikes
How to protect your inbox placement during Black Friday, product launches, and other high-volume sending events.
Gmail8 min
Google Postmaster Tools v2: The Complete Setup and Interpretation Guide
How to set up Google Postmaster Tools v2, read the Compliance status dashboard and its Deliverability analysis verdict, and plan for the reputation scores Google has said it will retire.
Klaviyo8 min
Klaviyo Emails Going to Spam: Troubleshooting Guide
Klaviyo can show a message as delivered while Gmail or Yahoo files it in spam. Here is how to separate Klaviyo's own complaint bands from Gmail's spam rate, then verify the fix on the next send.
Authentication7 min
SPF, DKIM, and DMARC Explained: The Authentication Trinity
A plain-English breakdown of the three email authentication standards every sender needs, plus who enforces them and what comes next.