Blog
Email Deliverability Guides & Best Practices
Guides, best practices, and intelligence from the InboxEagle team to help you land in the inbox every time.
Authentication6 min
SPF, DKIM, DMARC Checker: Verify All Three Records at Once
Seeing three different pass/fail screens for SPF, DKIM, and DMARC does not tell you whether your domain is actually protected. Here is what a real spf dkim dmarc checker verifies in one search, and what 591,862 real emails show about pass rates.
Analytics11 min
Test Your Email's Spam Score Before a Klaviyo Send
How to test your email's spam score before a Klaviyo send, using data from 528,475 real campaigns on what actually correlates with inbox placement.
Gmail9 min
Gmail Emails Going to Spam? What 514K Messages Show
Your ESP dashboard says delivered. Then you check Gmail and find it in Spam. We tracked 514,492 Gmail-bound ecommerce messages between 11 June and 11 September 2026: 25% landed in spam, and unauthenticated mail was more than twice as likely to get filtered. Here's what actually moves the needle — authentication, ESP choice, and sending volume — and what a blended, all-provider dashboard hides about your Gmail-specific problem.
E-commerce39 min
10 Best Email Deliverability Tools, Tested for Ecommerce (2026)
We tested email deliverability tools hands-on across placement testing, monitoring, warmup, and authentication, then ranked them for senders on any ESP. Here's what actually works, including where our own tool falls short.
Authentication7 min
What Is DKIM2? The Next Email Authentication Standard, Explained
DKIM2 is the IETF's overhaul of email authentication — closing replay attacks, broken forwarding, and bounce-routing gaps. What senders need to know before it ships.
Analytics9 min
What Does Email Deliverability Intelligence From 1.3M Inbox Sends Mean For Your Business
What is email deliverability intelligence? I analyzed 1.3M+ sends to show why SPF/DKIM/DMARC passes don't guarantee ecommerce inbox placement.
E-commerce9 min
The Pre-Q4 Email Deliverability Audit: What to Fix Before October
A five-area audit framework for email agencies preparing Klaviyo eCommerce clients for BFCM. Authentication, reputation, list hygiene, inbox placement, and infrastructure — what to check, what bad looks like, and what to fix before it is too late.
E-commerce27 min
eCommerce Email Deliverability: The Complete Guide for Klaviyo Brands (2026)
Everything Klaviyo eCommerce brands need to know about inbox placement, sender reputation, authentication, list hygiene, and seasonal deliverability. InboxEagle data: 1 in 6 marketing emails never reaches the primary inbox.
Klaviyo9 min
How to Win Email Marketing Clients with Deliverability Data
Most email agencies pitch services. The ones winning new clients are pitching problems the prospect didn't know they had. Here's how to use deliverability data to open doors, build trust, and close deals before a competitor even gets on the call.
E-commerce7 min
Amazon Prime Day Effect: How Competing Sales in July Damage Sender Reputation
Amazon Prime Day triggers an industry-wide email volume spike every July. Brands that run counter-programming sales without preparing their sending program pay for it in August, and sometimes all the way through Q4. Here is what happens and how to avoid it.
E-commerce10 min
Back-to-School Email Deliverability: The August Preparation Checklist
Back-to-school is the third-largest US eCommerce sending period of the year. Most brands start preparing the creative in June and ignore deliverability until August, which is exactly the wrong order. Here is what to audit, fix, and confirm before the sends start.
E-commerce7 min
5 Signs Your Email Program Has a Deliverability Problem (Not a Creative Problem)
Falling open rates and flat campaign revenue are easy to blame on subject lines and creative. But if the underlying problem is deliverability, no amount of copy testing will fix it. Here are the five signs that tell you where the problem actually is.