esmtpsslserver

Python - threaded ESMTP server that supports SSL/TLS and LOGIN authentication

Mainly based on bcoe's https://github.com/bcoe/secure-smtpd and posts to http://bugs.python.org/issue1057417 from Mark D Roth

Creates a threaded ESMTP server that supports SSL/TLS and LOGIN authentication.

Methods to sub

• validate_credentials(self,username,password)

• process_message(self, sender, recipients, msg)

• deny_sender(self,sender)

• deny_recipient(self,recipient)

• deny_host(self,hosttuple)

Useful things in an instance;

._email_addr_looks_valid(self,emailaddr) - very basic check for a valid email address

._is_valid_HELO(self,args) - very basic checks for valid HELO/EHLO hostname

.fdqn = set to fully qualified domain name of listening server

.version = set to display string for server name (after 'hostname ESMTP')

.username = set by AUTH, read in process_message to determine login name

.loggerfunc = set with a valid logging.getLogger() function to see debug output, or set with a function that has a .debug(str) method

.client_address = read for tuple(remote_ip,port)

EXAMPLE USAGE;

from esmtpsslserver import SSLSMTPServer, ESMTPRequestHandler
import socket

server = SSLSMTPServer(('0.0.0.0',4650),
                            ESMTPRequestHandler,
                            use_ssl=True,
                            certfile='/etc/somewhere/certfile.cert',
                            keyfile='/etc/somewhere/certfile.key',
                            )

server.RequestHandlerClass.fqdn=socket.getfqdn()
server.RequestHandlerClass.version='My funky ESMTP server'
server.serve_forever()