> ## Documentation Index
> Fetch the complete documentation index at: https://agents.nanonets.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Inbox Send Email

> Sends mail from this agent's dedicated inbox address.

Sends mail from this agent's dedicated inbox address. On by default for new agents. The From address is the agent's inbox and cannot be overridden.

Use this when the task was triggered by inbound email and you need to reply.

## Authentication and enablement

The agent must have an inbox (`agent_inboxes`). No user Gmail OAuth — this is platform inbound mail, not `gmail_send_email`.

## Inputs

* `to` (required): recipient addresses.
* `subject` (required): for replies, `Re: ` + original subject.
* `body` (required).
* `body_type` — `html` (default) or `text`.
* `cc`, `from_name`, `file_urls` (attachments as `${VAR_N}`) — optional.
* `reply_to_message_id` / `references` — from the original email's metadata to stay in-thread.

## Output

Send confirmation (message id / thread headers as returned by the mail path).

## Limits and side effects

* Sends a real email from the agent's inbox.
* From address is fixed; `from_name` is display-only.

## Expected errors

* Agent has no inbox.
* Empty `to`, `subject`, or `body`.
* Attachment URL unreadable.