How to Send Email Using Python FastAPI

Send Email Using Python FastAPI

Python’s FastAPI framework is a great way to develop RESTful APIs quickly. In this tutorial, we’ll see How to Send an Email Using Python FastAPI with the help of SendGrid service. We’ll first need to create a SendGrid account and obtain an API key. Then, we’ll install the required dependencies and write our Python code. After that, we’ll be able to run our FastAPI application and test it out!

What is FastAPI?

FastAPI is a web framework for building APIs with Python. It is based on the popular Flask web framework and provides a similar development experience. FastAPI is designed to be fast, efficient, and easy to use.

FastAPI is built on top of Starlette, a lightweight ASGI framework. This makes it perfect for building high-performance API servers. FastAPI also comes with several features that make it easy to build APIs, including:

– Automatic data validation

– Type checking

– Documentation generation

– Filtering

– Authentication and authorization support

Installations and Set-Up

Python’s FastAPI framework makes it easy to send emails using the SMTP protocol. First, however, there are a few things you need to do to get set up and send emails.

First, you need to install the FastAPI framework. You can do this using pip:

Pip installs fast API

Once you have FastAPI installed, you must create a file called in your project’s root directory. In this file, you will need to import the following modules:

from fastapi import FastAPI

from fast API.responses import RedirectResponse

import os

import smtplib

Next, you will need to create an instance of the FastAPI class:

app = FastAPI()

With your FastAPI instance created, you can now create a route that will send emails using the SMTP protocol. The code for this route looks like this:“/send-email”)

def send_email(): sender_email = os.environ[“EMAIL_USER”] receiver_email = “[email protected]” password = os.environ[“EMAIL_PASSWORD”] subject = “This is a test email” body = “This is the body of the test email.” with smtplib.SMTP(“,” 587) as

Creating the Python File

Python makes it simple to work with email. In this section, we’ll learn how to create a Python file that can send emails using FastAPI.

We’ll start by creating a new file called “” We’ll import the necessary modules:

import os

import smtplib

from email.message import EmailMessage

from fastapi import FastAPI

Then, we’ll set up some basic configuration variables:

EMAIL_ADDRESS = os. Environ.get(‘EMAIL_USER’)

EMAIL_PASSWORD = os. Environ.get(‘EMAIL_PASS’)



Here, we’re using Gmail as our SMTP server, but you can use any SMTP server you like. We’re also setting up a few environment variables that we’ll use to store our email address and password (make sure to set these in your .env file!).

Next, we’ll create a simple FastAPI app:

app = FastAPI()


def index():

return {“message”: “Hello World!”}

If you’re unfamiliar with FastAPI, don’t worry – we’re creating a primary API endpoint that returns a JSON response.

Testing the Python File

Assuming you have a Python file already created, you’ll need to import the FastAPI module first.

Next, create a new instance of the FastAPI class.

Then, add a route to your file using the @app.route() decorator. This route will be responsible for sending the email.

Within this route, you’ll need to specify the email recipient’s address, subject, and body. You can do this using variables or by hardcoding the values.

Once that is done, run your Python file and access the route you created to trigger the email send function.


Sending emails using Python FastAPI is a great way to stay connected with friends and family. It is also an excellent way to keep track of your work progress or communicate with your team members. You can use Python FastAPI to send simple text-based or more complex HTML messages. Whatever you choose, How to Send an Email Using Python FastAPI is easy and convenient.

Also Read: How to Send Emails to your Notion Workspace

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Miles Morgan is a Boston-based author with a particular interest in technology and its potential to change the world. He has been writing since he was a child and his work has been published in various magazines and newspapers.

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