python smtplib 发邮件 334错误

这里是错误说明
https://www.cnblogs.com/sjcatsoft/archive/2009/06/06/1497772.html

解决方案

    server = smtplib.SMTP_SSL(host=server_smtp, port=port_smtp)
    server.set_debuglevel(True)
    server.ehlo()
    server.starttls()
    server.ehlo()
    server.esmtp_features['auth'] = 'LOGIN PLAIN'
    server.login('bbrown', password)
    server.sendmail(fromaddr, toaddrs, str(BODY))
    server.quit()

https://stackoverflow.com/questions/30012563/send-email-with-pythons-smtplib-how-to-get-appropriate-login-credentials