Un simple serveur SMTP (en Python)

Prendre un coup d'oeil à ce Récepteur SMTP server:

from datetime import datetime
import asyncore
from smtpd import SMTPServer

class EmlServer(SMTPServer):
    no = 0
    def process_message(self, peer, mailfrom, rcpttos, data):
        filename = '%s-%d.eml' % (datetime.now().strftime('%Y%m%d%H%M%S'),
                self.no)
        f = open(filename, 'w')
        f.write(data)
        f.close
        print '%s saved.' % filename
        self.no += 1


def run():
    foo = EmlServer(('localhost', 25), None)
    try:
        asyncore.loop()
    except KeyboardInterrupt:
        pass


if __name__ == '__main__':
    run()

Il utilise smtpd.SMTPServer pour le vidage des e-mails des fichiers.

Deux python serveurs smtp j'ai utilisé avec succès sont:

1. Tordu de Mail - très souple bibliothèque mail pour SMTP, IMAP, ...
2. python-slimta Un MTA (smtp relais/serveur de transfert)

Tordu de l'exemple est montré ci-dessous

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
# You can run this module directly with:
#    twistd -ny emailserver.tac
"""
A toy email server.
"""
from __future__ import print_function
from zope.interface import implementer
from twisted.internet import defer
from twisted.mail import smtp
from twisted.mail.imap4 import LOGINCredentials, PLAINCredentials
from twisted.cred.checkers import InMemoryUsernamePasswordDatabaseDontUse
from twisted.cred.portal import IRealm
from twisted.cred.portal import Portal
@implementer(smtp.IMessageDelivery)
class ConsoleMessageDelivery:
def receivedHeader(self, helo, origin, recipients):
return "Received: ConsoleMessageDelivery"
def validateFrom(self, helo, origin):
# All addresses are accepted
return origin
def validateTo(self, user):
# Only messages directed to the "console" user are accepted.
if user.dest.local == "console":
return lambda: ConsoleMessage()
raise smtp.SMTPBadRcpt(user)
@implementer(smtp.IMessage)
class ConsoleMessage:
def __init__(self):
self.lines = []
def lineReceived(self, line):
self.lines.append(line)
def eomReceived(self):
print("New message received:")
print("\n".join(self.lines))
self.lines = None
return defer.succeed(None)
def connectionLost(self):
# There was an error, throw away the stored lines
self.lines = None
class ConsoleSMTPFactory(smtp.SMTPFactory):
protocol = smtp.ESMTP
def __init__(self, *a, **kw):
smtp.SMTPFactory.__init__(self, *a, **kw)
self.delivery = ConsoleMessageDelivery()
def buildProtocol(self, addr):
p = smtp.SMTPFactory.buildProtocol(self, addr)
p.delivery = self.delivery
p.challengers = {"LOGIN": LOGINCredentials, "PLAIN": PLAINCredentials}
return p
@implementer(IRealm)
class SimpleRealm:
def requestAvatar(self, avatarId, mind, *interfaces):
if smtp.IMessageDelivery in interfaces:
return smtp.IMessageDelivery, ConsoleMessageDelivery(), lambda: None
raise NotImplementedError()
def main():
from twisted.application import internet
from twisted.application import service    
portal = Portal(SimpleRealm())
checker = InMemoryUsernamePasswordDatabaseDontUse()
checker.addUser("guest", "password")
portal.registerChecker(checker)
a = service.Application("Console SMTP Server")
internet.TCPServer(2500, ConsoleSMTPFactory(portal)).setServiceParent(a)
return a
application = main()

Une approche plus moderne consiste à utiliser le aiosmtpd (bibliothèque de documentation disponible ici).

Vous pouvez trouver un bon exemple ici: https://aiosmtpd.readthedocs.io/en/latest/aiosmtpd/docs/controller.html.

Pour obtenir Hasen du script en Python 3, j'ai dû modifier légèrement:

from datetime import datetime
import asyncore
from smtpd import SMTPServer
class EmlServer(SMTPServer):
no = 0
def process_message(self, peer, mailfrom, rcpttos, data, **kwargs):
filename = '%s-%d.eml' % (datetime.now().strftime('%Y%m%d%H%M%S'),
self.no)
print(filename)
f = open(filename, 'wb')
f.write(data)
f.close
print('%s saved.' % filename)
self.no += 1
def run():
EmlServer(('localhost', 25), None)
try:
asyncore.loop()
except KeyboardInterrupt:
pass
if __name__ == '__main__':
run()