It looks like you have a file named email.py
. Don’t use file names that have the same name as Python standard library modules. Generally, your working directory comes earlier on the Python search path for importing modules so files in your working directory will override modules with the same name in the standard library.
The clue: note the path names in the traceback
File "email.py", line 1, in <module>
import smtplib
File "C:\Python27\lib\smtplib.py", line 46, in <module>
import email.utils
By the way, this is a very common error. The excellent tutorial in the Python standard documentation set talks about it here.