AgentMailTag: AI Agent Email Identifier

Automatically identify and flag AI agents in email threads—avoid wasted back-and-forth with bots

Problem

It's increasingly hard to tell whether the person on the other end of an email is human or an AI agent, often relying on guessing from the email domain. This leads to inefficient communication and even fraud. Recipients need a reliable way to identify AI agents and decide whether to continue the conversation.

Solution

An email plugin or standalone service that checks sender domain, email headers, and content patterns to automatically add a clear label (e.g., 'possibly from AI agent') to emails from AI agents. Users can set rules (auto-reply, archive, or route to human).

Users

Sales, customer support, and recruiting professionals who handle business communication via email, and anyone frustrated by AI agent emails.

MVP

Browser extension or email client plugin that analyzes sender info and content of the current email to produce an AI-agent likelihood score; one-click flagging and filter rules; simple feedback mechanism to improve detection.

Revenue

Free basic tier; premium subscription for custom rules, team-shared blocklists, and more accurate detection models.

Why now

AI agents sending emails is becoming common, but there's no unified identity standard; indie developers can start with a browser extension and quickly iterate on detection rules.