What sender reputation is—and how to see the evidence.
There is no single universal sender score. Learn how domain, IP, provider, complaint, blocklist, and placement evidence fit together—and what to do when they worsen.
Read the guideBetter email starts with better evidence.
Field guides for reaching the inbox, reading provider signals, and fixing the parts of your sending system that actually move placement.
More field guides — page 2
9 articles on this page
How seed-list testing measures inbox placement.
What seed inboxes measure, how messages are matched and classified, why results can be pending, and how to design repeatable tests without exposing active addresses.
4 min read
What inbox placement rate tells you.
A transparent formula for Inbox, Promotions, Spam, and Missing outcomes, with denominator choices, provider weighting, sample-size limits, and honest interpretation.
4 min read
Build a cold email system that keeps reaching the inbox.
A responsible operating system for domains, authentication, address quality, volume, copy, placement testing, monitoring, and incident response.
4 min read
Email deliverability best practices you can verify.
Turn familiar advice into an operating system with owners, pass conditions, evidence sources, a pre-send placement test, and a 30-day monitoring cadence.
4 min read
Test the real email before the real campaign.
A controlled pre-send workflow: prepare the production message, send it to seed inboxes, read provider outcomes, make one change, and retest.
4 min read
Why Mailchimp emails go to spam.
Confirm the provider pattern, authenticate your custom domain, inspect the audience and tracking path, and retest the exact Mailchimp campaign.
3 min read
Find why Klaviyo campaigns miss the inbox.
Diagnose branded sending domains, alignment, audience engagement, tracking links, cadence, and provider-specific placement without blaming the ESP by default.
3 min read
Find why HubSpot marketing emails land in spam.
Distinguish marketing from one-to-one sending, connect and verify the sending domain, review graymail and subscription controls, then test the provider outcome.
3 min read