欢迎！我白天是个邮递员，晚上就是个有抱负的演员。这是我的网站。我住在天朝的帝都，有条叫做Jack的狗。

import smtplibfrom email.mime.text import MIMETextfrom email.mime.multipart import MIMEMultipartfrom email.mime.application import MIMEApplicationfrom email.header import Headerfrom email.utils import parseaddr, formataddrimport mimetypesimport os  def send_email(smtp_server, username, password, sender, recipients, subject, content, cc, bcc, port=25, sendername=None, attachments=None):    def _format_addr(s):        name, addr = parseaddr(s)        return formataddr((Header(name, 'utf-8').encode(), addr))    if not attachments:        attachments = []    msg = MIMEMultipart()    if sendername:        msg['From'] = _format_addr(sendername + ' <%s>' % sender)    else:        msg['From'] = sender    if isinstance(recipients, str):        recipients = [recipients]    msg['To'] = ",".join(recipients)    if cc:        if isinstance(cc, str):            cc = [cc]        cc_list = [addr for addr in cc if addr not in recipients]        if cc_list:            msg['Cc'] = ",".join(cc_list)            recipients += cc_list    if bcc:        if isinstance(bcc, str):            bcc = [bcc]        bcc_list = [addr for addr in bcc if addr not in recipients]        if bcc_list:            msg['Bcc'] = ",".join(bcc_list)            recipients += bcc_list    msg['Subject'] = Header(subject, 'utf-8').encode()    text_part = MIMEText(content, 'html', 'utf-8')    msg.attach(text_part)    for attachment in attachments:        file_path = attachment["path"]        if not os.path.isfile(file_path):            print("附件文件不存在：{}".format(file_path))            continue        try:            with open(file_path, "rb") as f:                mime_type, encoding = mimetypes.guess_type(file_path)                if mime_type is None:                    mime_type = 'application/octet-stream'                part = MIMEApplication(f.read())                part.add_header('Content-Disposition', 'attachment', filename=attachment["filename"])                part.add_header('Content-Type', mime_type)                msg.attach(part)        except FileNotFoundError as e:            print("文件未找到：{}".format(e))        except Exception as e:            print("附件读取失败：{}".format(e))    try:        if str(port) == "25":            server = smtplib.SMTP(smtp_server, port)        else:            server = smtplib.SMTP_SSL(smtp_server, port)        server.login(username, password)        server.sendmail(sender, recipients, msg.as_string())        server.quit()        print("邮件发送成功！")    except Exception as e:        print("邮件发送失败：{}".format(e))   smtp_server = "smtp.aliyun.com"username = "[email protected]"password = "password"sender = "[email protected]"recipients = "[email protected]"cc = ["[email protected]","[email protected]"]bcc = ""subject = "title"content = "content"n = "name"port = 25attachments = [{"filename":"申请单.xlsx","path":"C:/申请单.xlsx"},               {"filename": "新课标.docx", "path": "D:/新课标.docx"},                {"filename": "笨笨狗.pdf", "path": "D:/books/笨笨狗.pdf"}] send_email(smtp_server, username, password, sender, recipients, subject, content, cc,bcc,port=port, sendername=n, attachments=attachments)