SMTP发送邮件报错 AttributeError: 'str' object has no attribute 'get_all'

源码： import smtplib from email.mime.text import MIMEText from email.header import Header # 定义SMTP邮件服务器地址 smtp_server = 'smtp.qq.com' # 邮件发送人邮箱 from_addr = '[email protected]' # 自己的邮想 # 邮件发送人邮箱密码 pass

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