o365_email_example.py

import msal
import requests

# Replace with your values
CLIENT_ID = 'your-client-id'
CLIENT_SECRET = 'your-client-secret'
TENANT_ID = 'your-tenant-id'
EMAIL = 'sender-email'

# 1. Define the MSAL authentication flow
authority = f"https://login.microsoftonline.com/{TENANT_ID}"
scopes = ["https://graph.microsoft.com/.default"]  # Permissions required for Microsoft Graph

# 2. Create a client instance with MSAL
client = msal.ConfidentialClientApplication(
    CLIENT_ID,
    client_credential=CLIENT_SECRET,
    authority=authority,
)

# 3. Acquire a token for Graph API
token_response = client.acquire_token_for_client(scopes)

if 'access_token' in token_response:
    access_token = token_response['access_token']
    
    # Set up the email details
    email_data = {
        "message": {
            "subject": "Test Email from Python",
            "body": {
                "contentType": "Text",
                "content": "Hello! This is a test email sent from a Python script using Microsoft Graph API."
            },
            "toRecipients": [
                {
                    "emailAddress": {
                        "address": "recipient-email"
                    }
                }
            ]
        },
        "saveToSentItems": "true"
    }
    
    # 4. Send the email using the Microsoft Graph API
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json"
    }
    response = requests.post(
        f"https://graph.microsoft.com/v1.0/users/{EMAIL}/sendMail",
        headers=headers,
        json=email_data
    )
    
    # Check if the email was sent successfully
    if response.status_code == 202:
        print("Email sent successfully!")
    else:
        print(f"Failed to send email. Status code: {response.status_code}")
        print(response.json())
else:
    print("Failed to acquire access token.")
    print(token_response.get("error"))
    print(token_response.get("error_description"))