如何在Python3中使用smtplib.sendmail()对收件人姓名(而不是地址)中的国际字符进行编码？

from email.mime.text import MIMEText

msg = MIMEText('这是一封测试邮件', 'plain', 'utf-8')

msg['From'] = '发件人邮箱'
msg['To'] = '收件人邮箱'
msg['Subject'] = '测试邮件'

from email.header import Header

name = '张三'
encoded_name = Header(name, 'utf-8').encode()
msg['To'] = encoded_name

import smtplib

smtp_server = 'SMTP服务器地址'
smtp_port = 'SMTP服务器端口号'
sender_email = '发件人邮箱'
sender_password = '发件人邮箱密码'

with smtplib.SMTP(smtp_server, smtp_port) as smtp:
    smtp.login(sender_email, sender_password)
    smtp.sendmail(sender_email, [msg['To']], msg.as_string())