app.py

import socket
import ssl
from smtpd import SMTPServer
import asyncore

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(('localhost', 587))
server_socket.listen(1)

context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
context.load_cert_chain(certfile="server.crt", keyfile="server.key")
class MySMTPServer(SMTPServer):
    def process_message(self, peer, mailfrom, rcpttos, data, mail_options=None, rcpt_options=None):
        print(data)
        return
server = MySMTPServer(("89.179.126.189", 1080), None)

asyncore.loop()

while True:
    print("Accepting")
    client_socket, addr = server_socket.accept()
    ssl_socket = context.wrap_socket(client_socket, server_side=True)
    print("Wrapped")
    ssl_socket.settimeout(10)
    data = ssl_socket.recv()
    print(data)
    print("Data Received")
    ssl_socket.close()