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

# Send emails with Axum

> Send your first email using Axum and the Resend Rust SDK.

## Prerequisites

Before you start, you'll need:

* A Resend [API key](/create-an-api-key)
* A [verified domain](/add-a-domain)

## 1. Install

Get the Resend Rust SDK and the [Tokio](https://tokio.rs) runtime.

```bash theme={"theme":{"light":"github-light","dark":"vesper"}}
cargo add resend-rs
cargo add tokio -F macros,rt-multi-thread
```

## 2. Send an Email

```rust theme={"theme":{"light":"github-light","dark":"vesper"}}
use std::sync::Arc;

use axum::{extract::State, http::StatusCode, routing::get, Router};
use resend_rs::types::CreateEmailBaseOptions;
use resend_rs::{Resend, Result};

// Cloning the Resend client is fine and cheap as the internal HTTP client is
// not cloned.
#[derive(Clone)]
struct AppState {
  resend: Resend,
}

#[tokio::main]
async fn main() {
  let shared_state = Arc::new(AppState {
    resend: Resend::new("re_xxxxxxxxx"),
  });

  // build our application with a single route
  let app = Router::new()
    .route("/", get(endpoint))
    // provide the state so the router can access it
    .with_state(shared_state);

  // run our app with hyper, listening globally on port 3000
  let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
  axum::serve(listener, app).await.unwrap();
}

async fn endpoint(State(state): State<Arc<AppState>>) -> Result<String, StatusCode> {
  let from = "Acme <onboarding@resend.dev>";
  let to = ["delivered@resend.dev"];
  let subject = "Hello World";

  let email = CreateEmailBaseOptions::new(from, to, subject)
    .with_html("<strong>It works!</strong>");

  // access the state via the `State` extractor and handle the error
  match state.resend.emails.send(email).await {
    Ok(email) => Ok(email.id.to_string()),
    Err(_) => Err(StatusCode::INTERNAL_SERVER_ERROR),
  }
}
```

Opening your browser at `http://localhost:3000` (or running `curl localhost:3000`) should send an
email and return you its id!

## 3. Try it yourself!

<CardGroup cols={3}>
  <Card title="Axum App" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/tree/main/rust-resend-examples/axum_app">
    Full Axum web framework application
  </Card>

  <Card title="Basic Send" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/basic_send.rs">
    Basic email sending
  </Card>

  <Card title="Attachments" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/with_attachments.rs">
    Send emails with file attachments
  </Card>

  <Card title="Templates" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/with_template.rs">
    Send emails using Resend hosted templates
  </Card>

  <Card title="Scheduling" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/scheduled_send.rs">
    Schedule emails for future delivery
  </Card>

  <Card title="Audiences" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/audiences.rs">
    Manage contacts and audiences
  </Card>

  <Card title="Domains" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/domains.rs">
    Create and manage sending domains
  </Card>

  <Card title="Inbound Webhooks" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/inbound.rs">
    Receive and process inbound emails
  </Card>

  <Card title="Double Opt-in" icon="arrow-up-right-from-square" href="https://github.com/resend/resend-examples/blob/main/rust-resend-examples/examples/double_optin_subscribe.rs">
    Double opt-in subscription flow
  </Card>
</CardGroup>