change to work w/ Python 3

[nadirhamid]

hello,

there were some changes required to your example during testing w/ python 3. i have included these changes in my forked version of your example.

changes made:

• changed CustomSMTPServer.process_message to work with python 3
• updated calls to print to work on python 3

please have a look. let me know if you have any comments.

thanks