mail中的Content-Transfer-Encoding定义和用法

python发送邮件时出现乱码, 搜索了一下可以通过更改Content-Transfer-Encoding定义解决.

msg = MIMEText(None, "plain")
msg.replace_header('content-transfer-encoding', 'quoted-printable')
msg.set_payload(content, 'utf-8')