您能否建议一个简单的 SMTP 服务器，它具有非常基本的 API（我的意思是非常基本的，读取、写入、删除电子邮件），可以在 Linux 机器上运行？ 我只需要将电子邮件的核心内容转换为 XML 格式，然后将其通过 FTP 传输到另一台机器即可。
看看这个SMTP接收服务器：
from __future__ import print_function
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():
# start the smtp server on localhost:1025
foo = EmlServer(('localhost', 1025), None)
try:
asyncore.loop()
except KeyboardInterrupt:
pass
if __name__ == '__main__':
run()
它使用
smtpd.SMTPServer发送电子邮件确实需要做两件事：
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()
# 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()
gist]：
app.py
from flask import Flask, render_template
from smtp_client import send_email
from smtp_server import SMTPServer
app = Flask(__name__)
@app.route('/send_email')
def email():
server = SMTPServer()
server.start()
try:
send_email()
finally:
server.stop()
return 'OK'
@app.route('/')
def index():
return 'Woohoo'
if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0')
smtp_server.py
# smtp_server.py
import smtpd
import asyncore
import threading
class CustomSMTPServer(smtpd.SMTPServer):
def process_message(self, peer, mailfrom, rcpttos, data):
print('Receiving message from:', peer)
print('Message addressed from:', mailfrom)
print('Message addressed to:', rcpttos)
print('Message length:', len(data))
return
class SMTPServer():
def __init__(self):
self.port = 1025
def start(self):
'''Start listening on self.port'''
# create an instance of the SMTP server, derived from asyncore.dispatcher
self.smtp = CustomSMTPServer(('0.0.0.0', self.port), None)
# start the asyncore loop, listening for SMTP connection, within a thread
# timeout parameter is important, otherwise code will block 30 seconds
# after the smtp channel has been closed
kwargs = {'timeout':1, 'use_poll': True}
self.thread = threading.Thread(target=asyncore.loop, kwargs=kwargs)
self.thread.start()
def stop(self):
'''Stop listening to self.port'''
# close the SMTPserver to ensure no channels connect to asyncore
self.smtp.close()
# now it is safe to wait for asyncore.loop() to exit
self.thread.join()
# check for emails in a non-blocking way
def get(self):
'''Return all emails received so far'''
return self.smtp.emails
if __name__ == '__main__':
server = CustomSMTPServer(('0.0.0.0', 1025), None)
asyncore.loop()
smtp_client.py
import smtplib
import email.utils
from email.mime.text import MIMEText
def send_email():
sender='[email protected]'
recipient='[email protected]'
msg = MIMEText('This is the body of the message.')
msg['To'] = email.utils.formataddr(('Recipient', recipient))
msg['From'] = email.utils.formataddr(('Author', '[email protected]'))
msg['Subject'] = 'Simple test message'
client = smtplib.SMTP('127.0.0.1', 1025)
client.set_debuglevel(True) # show communication with the server
try:
client.sendmail('[email protected]', [recipient], msg.as_string())
finally:
client.quit()
然后使用
python app.py
启动服务器，并在另一个请求中使用
/send_email模拟对
curl localhost:5000/send_email的请求。请注意，要实际发送电子邮件（或短信），您需要跳过此处详细介绍的其他环节：https://blog.codinghorror.com/so-youd-like-to-send-some-email-through-代码/.
Python SMTP 服务器。
该模块提供了几个类来实现 SMTP 服务器。一个是一个 通用的无所事事的实现，可以被覆盖，而 另外两个提供特定的邮件发送策略。
# Skip lines 3 and 4 if not using virtualenv.
# At command prompt
mkdir django1
cd django1
virtualenv venv
source venv/bin/activate
pip install django==1.11
django-admin startproject django1 .
# run the Django shell
python manage.py shell
# paste into shell following:
from django.core.mail import send_mail
send_mail(
'Subject here',
'Here is the message.',
'[email protected]',
['[email protected]'],
fail_silently=False,
)
# This should write an email like the following:
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: Subject here
From: [email protected]
To: [email protected]
Date: Wed, 02 May 2018 02:12:09 -0000
Message-ID: <20180502021209.32641.51865@i1022>
Here is the message.
send_mail 函数中不需要有有效值。上面的值在 hasen 的例子中可以很好地工作。