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[Python SDK]

Flask

Drop Reloop into Flask blueprints for simple, production-ready transactional email.

Step 1

Install the package

Add the official Python client to your Flask project.

bash
pip install reloop-email

Step 2

Set your API key

Create a free Reloop account, copy your API key, and add it to your Flask environment.

Get an API key free →
bash
RELOOP_API_KEY="re_xxxxxxxx"

Step 3

Send email from Flask

Use this Flask snippet to send your first message. Works with Blueprints · Routes.

send_email.py
1import os
2from flask import Flask, jsonify, request
3from reloop_email import Reloop
4

5app = Flask(__name__)
6reloop = Reloop(api_key=os.environ["RELOOP_API_KEY"])
7

8@app.post("/send")
9def send():
10    result = reloop.mail.send({
11        "from": "Acme <onboarding@yourdomain.com>",
12        "to": [request.json["to"]],
13        "subject": "Hello from Flask",
14        "html": "<strong>It works!</strong>",
15    })
16

17    if result.email_error:
18        return jsonify(error=str(result.email_error)), 500
19

20    return jsonify(id=result.response["id"])

Next steps

Examples, docs, and API reference

Go deeper with working code and the full API for Python.

Examples

Copy-paste Flask snippets and full integration guides.

Python docs

Install the SDK, authenticate, and send your first email.

API reference

Every REST endpoint, request body, and response shape.

Other frameworks

Same API, framework-specific examples.

Next.jsExpressNestJSFastifyElysiaDjangoFastAPILaravelRuby on RailsSpring BootASP.NET CorePhoenixGin

Send with Flask.

Get an API key and ship transactional email from Flask using the official Python SDK.

Get API Key
Reloop