如何实现发送异步邮件的功能？

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pythonimport smtplibfrom email.mime.text import MIMETextfrom email.header import Headerfrom email.utils import formataddrimport aiosmtplibimport asyncio

import smtplib
from email.mime.text import MIMEText
from email.header import Header
from email.utils import formataddr
import aiosmtplib
import asyncio


# 发送邮件函数
class EmailService():
def __init__(self):
self.mail_host = "smtp.ym.163.com" # 设置服务器
self.mail_port = 465
# self.mail_user = "xxx" # 用户名
self.mail_user = "xxx" # 用户名
self.mail_pass = "xxx"
self.sender = 'xxx'

async def SendEmail(self, mail_to, subject, msg):
receivers = mail_to.split(',')
if len(receivers) == 0:
return False

if len(msg) == 0:
return False

message = MIMEText(msg, 'html', 'utf-8')
# message['From'] = formataddr(['监控组', self.mail_user])
message['From'] = self.mail_user
# Header("警告处理人员", 'utf-8')
# message['To'] = formataddr(['警告处理人员', receivers[0]])
message['To'] = receivers[0]
if subject == "":
subject = '验证码'
message['Subject'] = Header(subject, 'utf-8')

try:
async with aiosmtplib.SMTP(self.mail_host, self.mail_port,use_tls=True) as smtpObj:

await smtpObj.login(self.mail_user, self.mail_pass)
await smtpObj.sendmail(self.sender, receivers, message.as_string())
await smtpObj.quit()
except aiosmtplib.SMTPException as e:
return False
return True

emailService = EmailService()
await emailService.SendEmail(email, subject, msg)
#