import smtplib, email, os, time
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.header import Header


#设置smtplib所需的参数
smtpserver = 'smtp.qq.com'  #SMTP服务器地址
username = 'xxx@qq.com'  # 发件人地址，通过控制台创建的发件人地址
password = '******' # 发件人密码，通过控制台创建的发件人密码
receiver = ['xxx@dadaodata.com'] #单个收件人
# receivers = ['xxx@dadaodata.com', 'xxx@qq.com']  # 收件人地址或是地址列表，支持多个收件人，最多30个

# 构造邮件MIMEMultipart对象
msg = MIMEMultipart('mixed')
msg['Subject'] = Header('自动化测试报告' + time.strftime("%Y-%m-%d"), 'utf-8').encode()#自定义邮件主题
msg['From'] = '%s <%s>' % (username, username)#邮件发送者
msg['To'] = ";".join(receiver)#邮件接受者
msg['Message-id'] = email.utils.make_msgid()
msg['Date'] = email.utils.formatdate()

# 构造文字内容
text_plain = MIMEText('附件为接口自动化测试报告，请查收！', 'plain', 'utf-8')#邮件内容
msg.attach(text_plain)

#构造附件
test_report = r'F:\PythonAutomation\Python_PyCharm\TestReport' #存放文件的目录
lists = os.listdir(test_report)  #列出目录的下所有文件保存到lists
lists.sort(key=lambda fn:os.path.getmtime(test_report + "\\" + fn)) #按时间排序
file_new = os.path.join(test_report,lists[-1])  #获取最新的文件保存到file_new
sendfile = open(file_new,'rb').read()
text_att = MIMEText(sendfile, 'base64', 'utf-8')
text_att["Content-Type"] = 'application/octet-stream'
text_att["Content-Disposition"] = 'attachment; filename="report.html"'#重新命名附件
msg.attach(text_att)

# 发送邮件
try:
    # client = smtplib.SMTP()
    # client.connect(smtpserver, 25) #SMTP普通端口为25
    client = smtplib.SMTP_SSL() #python 2.7以上版本，若需要可使用SSL
    client.connect(smtpserver, 465) #SSL端口465
    # client.set_debuglevel(1) #用set_debuglevel(1)可以打印出和SMTP服务器交互的所有信息
    client.login(username, password)
    client.sendmail(username, receiver, msg.as_string())
    client.quit()
    print('邮件发送成功')
except smtplib.SMTPConnectError as e:
    print('邮件发送失败，连接失败:', e.smtp_code, e.smtp_error)
except smtplib.SMTPAuthenticationError as e:
    print('邮件发送失败，认证错误:', e.smtp_code, e.smtp_error)
except smtplib.SMTPSenderRefused as e:
    print('邮件发送失败，发件人被拒绝:', e.smtp_code, e.smtp_error)
except smtplib.SMTPRecipientsRefused as e:
    print('邮件发送失败，收件人被拒绝:', e.args, e.recipients)
except smtplib.SMTPDataError as e:
    print('邮件发送失败，数据接收拒绝:', e.smtp_code, e.smtp_error)
except smtplib.SMTPException as e:
    print('邮件发送失败: ', str(e))
except Exception as e:
    print('邮件发送失败: ', str(e))

执行结果如下：