from email.mime.text import MIMEText  import smtplib  import getpass     msg = MIMEText('这是一封来自python的纯文本邮件','plain','utf-8')     from_addr = '发件人邮箱地址'  password = getpass.getpass('Password:')  smtp_server = 'smtp.163.com'  smtp_port = 994  to_addr = '收件人邮箱地址*'        server = smtplib.SMTP(smtp_server,smtp_port)  server.starttls()  server.set_debuglevel(1)  server.login(from_addr,password)  server.sendmail(from_addr,[to_addr],msg.as_string())  server.quit()