AI Identification in Email
Every email an agent sends says clearly that it was written by AI, and who is responsible for it
When an agent sends, replies to, or forwards an email on your behalf, Operator automatically adds AI identification. You don't configure anything — it applies to all agents, all mailboxes, and both Microsoft 365 and Gmail.
What recipients see
A short disclosure line at the top of the message and a footer with a verification link. For example:
Sent by Anna, an AI assistant acting for Ivan Petrov. This message was generated by AI.
…the agent's message…
AI-generated by Operator.net · Verify: https://operator.net/provenance/01JB…
The sender is never presented as a person
An agent never sends as plain Ivan Petrov. The sender is always shown as an AI identity:
Anna — AI Assistant of Ivan Petrov— a named agent working for a personAI Assistant of Ivan Petrov— an unnamed agent working for a personBusiness Specialist — AI Agent (Operator)— an agent with no assigned owner name
When you use a user-defined agent, its own name is shown. The built-in agent name is used only as a fallback when no user-defined name exists.
Replies go to the responsible person's address, so recipients still reach a human.
Microsoft 365 note: Microsoft always shows the mailbox owner's own name as the sender, and this cannot be overridden. For those mailboxes, the disclosure line at the top of the message carries the AI identification instead.
What machines see
Alongside the visible text, each message carries machine-readable identification so mail clients, filters, and compliance tools can detect AI-generated mail:
AI-Generated,AI-Provider,AI-Provenance-ID,AI-Generation-Time,AI-DetectionAgent-Of— the responsible person's addressAgent-Attribution— a signed record of the agent, its owner, autonomy level, and message fingerprintAuto-Submitted— marks messages sent without a human in the loop
Longer messages (over 200 characters) also carry an invisible watermark that survives copy-paste.
Verification
Every message gets its own provenance record, cryptographically signed by Operator. Anyone can open the verification link in the footer to confirm:
- that the message was AI-generated,
- which agent wrote it and who is responsible for it,
- whether it was sent autonomously or with human approval,
- when it was generated.
The record never exposes the message content, subject, or recipients — only a fingerprint that proves the text hasn't been altered.
Why this exists
The EU AI Act requires that people are told when they're interacting with AI-generated content. Beyond compliance, it's a trust boundary: an autonomous agent acting for someone is never the same as being that person, and Operator enforces that distinction at the platform level.