using MailKit.Net.Smtp;

using MimeKit;

        /// <summary>

        /// 发送邮件

        /// </summary>

        /// <param name="Name">发件人名字</param>

        /// <param name="receive">接收邮箱</param>

        /// <param name="sender">发送邮箱</param>

        /// <param name="password">邮箱密码</param>

        /// <param name="host">邮箱主机</param>

        /// <param name="port">邮箱端口</param>

        /// <param name="subject">邮件主题</param>

        /// <param name="body">邮件内容</param>

        /// <returns></returns>

        public async Task<bool> SendMailAsync(string Name, string receive, string sender, string password, string host, int port, string subject, string body)

        {

            try

            {

　　　　　　　　　 # MimeMessage代表一封电子邮件的对象

                var message = new MimeMessage();

　　　　　　　　　 # 添加发件人地址 Name 发件人名字 sender 发件人邮箱

                message.From.Add(new MailboxAddress(Name, sender));

　　　　　　　　　 # 添加收件人地址

                message.To.Add(new MailboxAddress("", receive));

　　　　　　　　　 # 设置邮件主题信息

                message.Subject = subject;

　　　　　　　　　 # 设置邮件内容

                var bodyBuilder = new BodyBuilder() { HtmlBody = body };

                message.Body = bodyBuilder.ToMessageBody();

                using (var client = new SmtpClient())

                {

                    // For demo-purposes, accept all SSL certificates (in case the server supports STARTTLS)

                    client.ServerCertificateValidationCallback = (s, c, h, e) => true;

                    // Note: since we don't have an OAuth2 token, disable

                    // the XOAUTH2 authentication mechanism.

                    client.AuthenticationMechanisms.Remove("XOAUTH2");

                    client.CheckCertificateRevocation = false;

                    //client.SslProtocols = System.Security.Authentication.SslProtocols.Tls12;

                    client.Connect(host, port, MailKit.Security.SecureSocketOptions.Auto);

                    // Note: only needed if the SMTP server requires authentication

                    client.Authenticate(sender, password);

                    await client.SendAsync(message);

                    client.Disconnect(true);

                    return true;

                }

            }

            catch (Exception ex)

            {

            }

            return false;

        }