Valid Email Checker Python

checkEmail.py

import socket
mailserver = 'gmail-smtp-in.l.google.com'
clientSocket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
clientSocket.connect((mailserver, 25))
print(clientSocket.recv(2048))
clientSocket.send('HELO verifyemailaddress.org \r\n'.encode())
print(clientSocket.recv(2048))
clientSocket.send('MAIL FROM: <noreply@verifyemailaddress.org>\r\n'.encode())
print(clientSocket.recv(2048))
clientSocket.send('RCPT TO: <mksdsd233sssdsdpta74d@gmail.com>\r\n'.encode())
print(clientSocket.recv(2048))
clientSocket.send('QUIT\r\n'.encode())
print(clientSocket.recv(2048))