> ## Documentation Index
> Fetch the complete documentation index at: https://learn.workflow.dog/llms.txt
> Use this file to discover all available pages before exploring further.

# Send Email

> Send a transactional email immediately with Resend.

Resend **Send Email** sends an HTML email immediately, with optional text,
copy recipients, reply-to addresses, and tracking tags.

## Inputs

| Input                   | Type                     | Required | Description                                       |
| ----------------------- | ------------------------ | -------- | ------------------------------------------------- |
| **Third-party account** | Resend account           | Yes      | The API key used to send.                         |
| **From**                | String                   | Yes      | A sender such as `Acme <onboarding@example.com>`. |
| **Recipients**          | List of emails           | Yes      | One or more destination addresses.                |
| **CC** / **BCC**        | Lists of emails          | No       | Copy recipients.                                  |
| **Subject**             | String                   | Yes      | A non-empty subject.                              |
| **HTML Content**        | String                   | Yes      | The HTML message body.                            |
| **Plain Text**          | String                   | No       | A text-only alternative.                          |
| **Reply To**            | List of strings          | No       | Addresses that receive replies.                   |
| **Tags**                | List of name/value pairs | No       | Resend metadata for categorization.               |

Tag names and values should contain only letters, numbers, underscores, and
dashes.

## Output

| Output       | Type   | Description                       |
| ------------ | ------ | --------------------------------- |
| **Email ID** | String | Resend's identifier for the send. |

<Tip>
  Store **Email ID** when a later action must retrieve delivery details.
</Tip>