# 導(dǎo)包
　　首先我們需要導(dǎo)入 MailKit NuGet包，NuGet安裝包命令在下方拓展介紹中。
# 引用命名空間
using MailKit.Net.Smtp;
using MimeKit;
# 郵件發(fā)送幫助類
  /// <summary>
  /// 發(fā)送郵件
  /// </summary>
  /// <param name="Name">發(fā)件人名字</param>
  /// <param name="receive">接收郵箱</param>
  /// <param name="sender">發(fā)送郵箱</param>
  /// <param name="password">郵箱密碼</param>
  /// <param name="host">郵箱主機(jī)</param>
  /// <param name="port">郵箱端口</param>
  /// <param name="subject">郵件主題</param>
  /// <param name="body">郵件內(nèi)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代表一封電子郵件的對(duì)象
    var message = new MimeMessage();
　　　　　　　　　 # 添加發(fā)件人地址 Name 發(fā)件人名字 sender 發(fā)件人郵箱
    message.From.Add(new MailboxAddress(Name, sender));
　　　　　　　　　 # 添加收件人地址
    message.To.Add(new MailboxAddress("", receive));
　　　　　　　　　 # 設(shè)置郵件主題信息
    message.Subject = subject;
　　　　　　　　　 # 設(shè)置郵件內(nèi)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;
  }