**首先是：pip search smtplib
然后会出现很多的可供选择的库，按照需要下载就好了**
PyEmail (0.0.1) - Python library to send emails using SMTPLIB library
micropython-smtplib (0.0.0) - Dummy smtplib module for MicroPython
personal (0.1.1) - Easy, secure self notification via email and sms, using smtplib and twilio
aiosmtplib (0.1.4) - asyncio version of smtplib
secure-smtplib (0.1.1) - Secure SMTP subclasses for Python 2
mailclient (0.2.0) - Simplified use of smtplib for Python. Easy email sending.
smtplibaio (1.0.3) - An async version of smtplib
easyemail (0.4.0) - Simple lib abstracting email sending with smtplib.
这里一般用PyEmail,所以直接pip install PyEmail 就行 ，然后在import smtplib