Send Email with Azure Communication Services in Python Flask: Step-by-Step Guide

Here's the the workflow for sending an email using Azure Communication Services in a Python Flask application:

Key Components:

User: The individual interacting with the system.
Browser: The interface through which the user accesses the Flask app.
Flask App: The backend application handling the logic.
Azure Communication Services (ACS): The service used for sending emails.

This sequence diagram ensures a clear understanding of the interaction flow, error handling, and successful email delivery process.

To send an email using Azure Communication Services (ACS) in a Python Flask application, follow this step-by-step guide. The process involves setting up ACS, creating a Flask app, and integrating the email sending functionality.

Step 1: Set Up Azure Communication Services

Create an Azure Communication Services Resource:
- Go to the Azure portal: https://portal.azure.com/
- Search for Azure Communication Services and create a new resource.
- Once the resource is created, go to the Keys section, where you'll find your connection string.
Get the email sender's address:
- You'll need an email address to send from. For this, you can use a domain that is verified in your Azure Communication Services account.

Step 2: Install the Required Libraries

First, ensure you have the necessary packages installed. Open your terminal and install the required libraries:

pip install azure-communication-email flask

Step 3: Create Your Flask Application

Create a simple Flask app. Below is an example of how you can set up the email sending functionality.

from flask import Flask, render_template, request, redirect, url_for
from azure.communication.email import EmailClient
from azure.communication.email import EmailMessage, EmailAddress
from azure.core.exceptions import AzureError
import os

app = Flask(__name__)

# Get your connection string from the Azure portal
connection_string = "YOUR_CONNECTION_STRING"
email_client = EmailClient.from_connection_string(connection_string)

@app.route('/', methods=['GET', 'POST'])
def send_email():
    if request.method == 'POST':
        to_email = request.form['to_email']
        subject = request.form['subject']
        content = request.form['content']

        # Create the email message
        message = EmailMessage(
            sender=EmailAddress(email="sender@example.com"),  # Replace with your verified email
            recipients=[EmailAddress(email=to_email)],
            subject=subject,
            body=content
        )

        try:
            # Send the email
            response = email_client.send(message)
            return f"Email sent successfully! Response: {response}"
        except AzureError as e:
            return f"Error sending email: {e}"

    return render_template('index.html')

if __name__ == '__main__':
    app.run(debug=True)

Step 4: Create the HTML Template

Create an index.html file to allow users to input email details:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Send Email</title>
</head>
<body>
    <h1>Send Email Using Azure Communication Services</h1>
    <form method="POST">
        <label for="to_email">To Email:</label><br>
        <input type="email" id="to_email" name="to_email" required><br><br>

        <label for="subject">Subject:</label><br>
        <input type="text" id="subject" name="subject" required><br><br>

        <label for="content">Content:</label><br>
        <textarea id="content" name="content" rows="4" cols="50" required></textarea><br><br>

        <input type="submit" value="Send Email">
    </form>
</body>
</html>

Step 5: Run Your Flask App

Now you can run the Flask app:

python app.py

Visit http://127.0.0.1:5000/ in your browser to access the form and send an email.

Step 6: Testing and Error Handling

Ensure that the email address you're using to send emails is verified in Azure Communication Services.
Handle possible errors, such as invalid email addresses or network issues, in your try-except block.

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