We Analysed 10,000 Cold Emails. Here's What We Found.
An analysis of 10,000 cold emails intercepted by Captchainbox's sender verification system — patterns, statistics, and what the data reveals about the AI cold email industry.
9 articles
An analysis of 10,000 cold emails intercepted by Captchainbox's sender verification system — patterns, statistics, and what the data reveals about the AI cold email industry.
AI-generated emails are designed to look human-written. But there are patterns that can help you identify them — though the most reliable approach doesn't involve reading the email at all.
A technical look at how AI cold email platforms like Instantly, Lemlist, and Apollo generate, personalise, and send thousands of emails — and why spam filters can't catch them.
The definitive collection of email spam statistics for 2026 — from global volume to AI-generated threats to the cost of inbox overload. Updated with the latest data.
A $50/month subscription to a cold email tool can reach 10,000 inboxes per week. Here's how the economics work — and why they're unsustainable.
Cold email worked when it was rare, personal, and human. Now it's automated, abundant, and AI-generated. The model is breaking — here's what replaces it.
The next wave of email spam isn't written by AI — it's sent by AI agents that autonomously research, personalise, and follow up without human involvement. Here's what's happening.
Gmail blocks 99.9% of spam — but AI-generated cold email is designed to bypass every signal Gmail looks for. Here's what's changed and what to do about it.
More than half of all spam emails are now created by AI. Here's what the data shows, why it matters, and how to protect yourself.