Created
March 6, 2011 17:53
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A python LMTP server using the smtpd module
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#!/bin/env python | |
from smtpd import SMTPChannel, SMTPServer | |
import asyncore | |
class LMTPChannel(SMTPChannel): | |
# LMTP "LHLO" command is routed to the SMTP/ESMTP command | |
def smtp_LHLO(self, arg): | |
self.smtp_HELO(arg) | |
class LMTPServer(SMTPServer): | |
def __init__(self, localaddr, remoteaddr): | |
SMTPServer.__init__(self, localaddr, remoteaddr) | |
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) | |
print 'Message :', data | |
return | |
def handle_accept(self): | |
conn, addr = self.accept() | |
channel = LMTPChannel(self, conn, addr) | |
server = LMTPServer(('localhost', 10025), None) | |
asyncore.loop() |
No, this is one of the ways LMTP differs from SMTP. rfc2033 4.2 says that DATA should return multiple responses, one for each RCPT that was accepted earlier.
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Oh, for this you would end up needing to return specific text codes, like : "550 No such user here" or "550 mailbox not found".
The spec also claims that you could return a 550 code with a list of recipients that failed. However I'm not sure that is actually supported so you'd have to test that out.
See page 50 in the spec for all the details:
http://www.ietf.org/rfc/rfc2821.txt
But to reject a specific recipient you are supposed to be hooked into the RCPT channel, something like here. (most of the method is copied from the
SMTPChannel
source code)