python - 如何在 poplib 中仅搜索包含附件的电子邮件

Question

我正在尝试使用 poplib 搜索电子邮件并仅获取带有附件的电子邮件，我有一些当前代码，但它下载所有电子邮件的速度太慢，有什么方法可以在服务器上搜索电子邮件有附件然后下载吗？

def fetch_mail(delete_after=False):
    pop_conn = mail_connection()
    print("connected")
    messages = [pop_conn.retr(i) for i in range(1, len(pop_conn.list()[1]) + 1)]
    messages = ["\n".join(mssg[1]) for mssg in messages]
    messages = [parser.Parser().parsestr(mssg) for mssg in messages]
    if delete_after == True:
        delete_messages = [pop_conn.dele(i) for i in range(1, len(pop_conn.list()[1]) + 1)]
    pop_conn.quit()
    return messages


allowed_mimetypes = ["text/plain"]


def get_attachments():
    messages = fetch_mail()
    attachments = []
    for msg in messages:
        for part in msg.walk():
            if part.get_content_type() in allowed_mimetypes:
                name = part.get_filename()
                data = part.get_payload(decode=True)
                if name != None:
                    ranint = random.randint(100000,999999)
                    f = open(str(ranint) + name, 'wb')
                    f.write(data)
                    f.close()
                    attachments.append(name)
            else:
                continue
    return attachments```

Answer 1

POP3 协议(protocol)不支持搜索或任何其他可能允许您确定哪些邮件带有附件的功能。如果您被 POP3 困住了，那您就不走运了。