---
title: "Cold Email Deliverability Research & Studies"
description: "Original cold email research measured on live sending infrastructure: monthly inbox placement tests and a full SURBL sweep of 2,817 sending domains. Free, no…"
url: https://warminboxes.com/research
breadcrumb: "Home > Deliverability Hub > Studies"
---
# Studies

Original cold email research measured on live sending infrastructure: monthly inbox placement tests and a full SURBL sweep of 2,817 sending domains. Free, no signup.