python 發送郵件（附件名稱為中文）

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart

mailto_list = ["[e-mail]"]
mail_host = "smtp.163.com"
mail_user = "[e-mail]"
mail_pass = "password"
# mail_subject = "python發送郵件測試"  # 郵件的標題
# mail_context = "這是郵件內容-----XXOO"

def send_main(mail_subject, Filename):
    msg = MIMEMultipart()
    msg["From"] = mail_user   # 發件人
    msg["To"] = ";".join(mailto_list)  # 收件人
    msg["Subject"] = mail_subject   # 郵件標題
    # 郵件正文
    with open(Filename, "rb") as f:
        fc = f.read()
    txt = MIMEText(fc, 'html', 'utf-8')
    msg.attach(txt)
    # 構造附件
    att = MIMEText(open(Filename, "rb").read(), "base64", "utf-8")
    att["Content-Type"] = "application/octet-stream"
    # 附件名稱為中文時的寫法
    att.add_header("Content-Disposition", "attachment", filename=("gbk", "", "5.3版本接口詳細測試結果.html"))
    # 附件名稱非中文時的寫法
    # att["Content-Disposition"] = 'attachment; filename="test.html")'
    print(1)
    msg.attach(att)

    smtp = smtplib.SMTP()
    smtp.connect(mail_host)
    smtp.login(mail_user, mail_pass)
    smtp.sendmail(mail_user, mailto_list, msg.as_string())
    smtp.quit()
    print("郵件發送成功")