import base64 
import poplib 
import requests 
 
def get_access_token(client_id,refresh_token): 
    data = { 
        'client_id': client_id, 
        'grant_type': 'refresh_token', 
        'refresh_token': refresh_token 
    } 
    ret = requests.post('https://login.live.com/oauth20_token.srf', data=data) 
 
    # Print the response text and access token 
    print(ret.text) 
    print(ret.json()['access_token']) 
    return ret.json()['access_token'] 
 
# Generate OAuth2 authentication string using the access token 
def generate_auth_string(user, token): 
    auth_string = f"user={user}\1auth=Bearer {token}\1\1" 
    return auth_string 
 
pop3_server = 'outlook.office365.com' 
pop3_port = 995  # POP3 over SSL 
 
def connect_pop3(email, access_token): 
    server = poplib.POP3_SSL(pop3_server, pop3_port) 
    # Use OAuth2 authentication 
    auth_string = generate_auth_string(email, access_token) 
    encoded_auth_string = base64.b64encode(auth_string.encode("utf-8")).decode("utf-8") 
    server._shortcmd(f'AUTH XOAUTH2') 
    server._shortcmd(f'{encoded_auth_string}') 
 
    # Retrieve the list of emails 
    num_messages = len(server.list()[1]) 
    print(f"There are {num_messages} emails in the inbox.") 
 
    # Retrieve email content 
    for i in range(num_messages): 
        response, lines, octets = server.retr(i + 1) 
        msg_content = b"\n".join(lines).decode("utf-8") 
        print(f"Email {i + 1}:") 
        print(msg_content) 
        print("=" * 50) 
 
# Set the email address and refresh token 
client_id = 'YOUR_CLIENT_ID' 
email = "your_email@hotmail.com" 
t = "YOUR_REFRESH_TOKEN" 
 
# Get the access token using the refresh token 
acc_token = get_access_token(client_id,t) 
 
# Connect to POP3 server and access emails 
connect_pop3(email, acc_token)