python 脚本执行报错，是什么问题

[jackjiaxiong]

Traceback (most recent call last):
File "test.py", line 5, in
import smtplib
File "/usr/lib64/python2.6/smtplib.py", line 46, in
import email.utils
File "/tmp/email.py", line 5, in
from email.mime.multipart import MIMEMultipart
ImportError: No module named mime.multipart