用python标准库smtplib和email模块发邮件

报错如下：

Traceback (most recent call last):

  File "D:/AUTOTEST/sweetest_example/sendemaildemo2.py", line 53, in <module>

    server.sendmail(from_addr,areceiver.split(',')+acc.split(','),msg.as_string())

  File "D:\ToolsDownloads\Python-3.7.3\lib\smtplib.py", line 888, in sendmail

    raise SMTPDataError(code, resp)

smtplib.SMTPDataError: (554, b'DT:SPM 163 smtp12,EMCowAAnhwelrDZdzm1+CQ--.27641S2 1563864230

代码如下：

# -*- coding: UTF-8 -*-

import smtplib

from emailimport encoders

from email.headerimport Header

from email.mime.textimport MIMEText

from email.utilsimport parseaddr,formataddr

from email.mime.applicationimport MIMEApplication

from email.mime.multipartimport MIMEMultipart

#发件人邮箱

asender="sunzhi@163.com"

#收件人邮箱

areceiver="1905774291@qq.com"

#抄送人邮箱

acc="1949348145@qq.com"

asubject="这是一份测试邮件"

#发件人地址

from_addr ="sunzhi@163.com"

#邮箱授权码

password="123456"

#邮件设置

msg = MIMEMultipart()

msg['Subject'] = asubject

msg['to'] = areceiver

msg['Cc'] = acc

msg['from'] ="sunzhi@163.com"

#邮件正文内容

body ="自动化测试结果"

#添加邮件正文

msg.attach(MIMEText(body,'plain','utf-8'))

#添加附件，注意文件路径是斜杠

xlsxpart = MIMEApplication(open('D:/AUTOTEST/sweetest_example/report/SystemM_UserM_001/SystemM_UserM_001-Report@20190606_104202.xlsx','rb').read())

xlsxpart.add_header('Content-Disposition','attachment',filename="测试结果的附件")

msg.attach(xlsxpart)

#设置邮箱服务器地址以及端口

smtp_server ="smtp.163.com"

server = smtplib.SMTP(smtp_server,25)

# server.set_debuglevel(1)

#登录邮箱

server.login(from_addr,password)

print(areceiver.split(',')+acc.split(','))

#发送邮件

server.sendmail(from_addr,areceiver.split(',')+acc.split(','),msg.as_string())

#断开服务器链接

server.quit()

解决办法：

26行：msg['from'] ="sunzhi@163.com"  这行代码给变量赋值的是个字符串，应该改成：msg['from'] = asender，这样才是把邮箱地址赋值给了这个参数