#!/usr/bin/python
default_encoding = 'utf-8'
import socket
import ssl
import base64
import time



context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
context.verify_mode = ssl.CERT_REQUIRED
context.check_hostname = True
context.load_default_certs()
msg = "\r\n I love computer networks!"
endmsg = "\r\n.\r\n"

mailserver = ('smtp.cc.ncu.edu.tw', 587)

clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

ssl_sock = context.wrap_socket(clientSocket, server_hostname = 'smtp.cc.ncu.edu.tw')

clientSocket.connect(mailserver)

recv = clientSocket.recv(1024).decode()

print(recv)
if recv[:3] != '220':
    print('220 reply not received from server.')

heloCommand = 'HELO Alice\r\n'
clientSocket.send(heloCommand.encode())

recv1 = clientSocket.recv(1024).decode()

print(recv1)
if recv1[:3] != '250':
    print('250 reply not received from server.')

username = ""   #YourEmailAddress
password = ""   #YourEmailPassword

base64_usernameAndPassword = ("\x00" + username + "\x00" + password).encode()
base64_usernameAndPassword = base64.b64encode(base64_usernameAndPassword)

authMsg = "AUTH PLAIN ".encode() + base64_usernameAndPassword + "\r\n".encode()
clientSocket.send(authMsg)

recv_auth = clientSocket.recv(1024)

print(recv_auth.decode())

mailFrom = "MAIL FROM: <>\r\n"  #YourEmailAddress(SEND)
clientSocket.send(mailFrom.encode())
recv = clientSocket.recv(1024).decode()
print("MAIL FROM after: "+recv)

rcptTo = "RCPT TO:<>\r\n"       #YourEmailAddress(RCV)
clientSocket.send(rcptTo.encode())
recv = clientSocket.recv(1024).decode()
print("MAIL FROM after: "+ recv)

data = "DATA\r\n"
clientSocket.send(data.encode())
recv = clientSocket.recv(1024).decode()
print("DATA after: " + recv)

Subject = "Subject: blyat\r\n"
clientSocket.send(Subject.encode())

clientSocket.send(msg.encode())
clientSocket.send("\r\n".encode())
clientSocket.send(endmsg.encode())
recv = clientSocket.recv(1024).decode()
print("after send message:" + recv)

quit = "QUIT\r\n"
clientSocket.send(quit.encode())
recv = clientSocket.recv(1024).decode()
print(recv)

clientSocket.close()