# Send emails with Flask

## Prerequisites

Before you start, you'll need:

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

## Guide

:::::steps
::::step{title="Install"}
Get the Resend Python SDK.

:::code-group
```bash Pip theme={"theme":{"light":"github-light","dark":"vesper"}}
pip install resend
```
:::
::::

:::step{title="Send email using HTML"}
The easiest way to send an email is by using the `html` parameter.

```py index.py theme={"theme":{"light":"github-light","dark":"vesper"}}
import resend
import os
from flask import Flask, jsonify

resend.api_key = os.environ["RESEND_API_KEY"]

app = Flask(__name__)


@app.route("/")
def index():
    params: resend.Emails.SendParams = {
        "from": "Acme <onboarding@resend.dev>",
        "to": ["delivered@resend.dev"],
        "subject": "hello world",
        "html": "<strong>it works!</strong>",
    }

    r = resend.Emails.send(params)
    return jsonify(r)


if __name__ == "__main__":
    app.run()
```
:::
:::::

## Examples

::::card-grid
:::card{title="Flask App" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/flask_app.py" icon="arrow-up-right-from-square"}
Full Flask web application
:::

:::card{title="Basic Send" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/basic_send.py" icon="arrow-up-right-from-square"}
Basic email sending
:::

:::card{title="Attachments" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/with_attachments.py" icon="arrow-up-right-from-square"}
Send emails with file attachments
:::

:::card{title="Templates" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/with_template.py" icon="arrow-up-right-from-square"}
Send emails using Resend hosted templates
:::

:::card{title="Scheduling" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/scheduled_send.py" icon="arrow-up-right-from-square"}
Schedule emails for future delivery
:::

:::card{title="Audiences" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/audiences.py" icon="arrow-up-right-from-square"}
Manage contacts and audiences
:::

:::card{title="Domains" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/domains.py" icon="arrow-up-right-from-square"}
Create and manage sending domains
:::

:::card{title="Inbound Webhooks" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/inbound.py" icon="arrow-up-right-from-square"}
Receive and process inbound emails
:::

:::card{title="Double Opt-in" href="https://github.com/resend/resend-examples/blob/main/python-resend-examples/examples/double_optin_subscribe.py" icon="arrow-up-right-from-square"}
Double opt-in subscription flow
:::
::::

## Related pages

- [Send emails with Python](./get-started-send-with-python.md)
- [Send emails with FastAPI](./get-started-send-with-fastapi.md)
- [Send emails with Django](./get-started-send-with-django.md)

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