C# 发送邮件到指定邮箱

• C#使用 System.Net.Mail发送邮件功能

---

1. 注意要引用 System.Net.Mail
2. 使用163的SMTP服务器发送邮件，要提前申请一个授权码。
3. 

4. public class EmailHelper
       {
           private readonly static string SmtpServer = "smtp.163.com";//smtp服务器
           private readonly static int SmtpServerPort = 25;
           private readonly static bool SmtpEnableSsl = false;
           private readonly static string SmtpUsername = "138******@163.com";//发件人邮箱地址
           private readonly static string SmtpDisplayName = "***科技";//发件人昵称
           private readonly static string SmtpUserPassword = "655***";//授权码
   
           /// <summary>
           /// 发送邮件到指定收件人
           /// </summary>
           /// <param name="to">收件人地址</param>
           /// <param name="subject">主题</param>
           /// <param name="mailBody">正文内容（支持HTML）</param>
           /// <param name="copyTos">抄送地址列表</param>
           /// <returns>是否发送成功</returns>
           public static bool Send(string to, string subject, string mailBody, params string[] copyTos)
           {
               return Send(new[] { to }, subject, mailBody, copyTos, new string[] { }, MailPriority.Normal);
   
           }
   
           /// <summary>
           /// 发送邮件到指定收件人
           /// </summary>
           /// <remarks>
           ///  2013-11-18 18:55 Created By iceStone
           /// </remarks>
           /// <param name="tos">收件人地址列表</param>
           /// <param name="subject">主题</param>
           /// <param name="mailBody">正文内容(支持HTML)</param>
           /// <param name="ccs">抄送地址列表</param>
           /// <param name="bccs">密件抄送地址列表</param>
           /// <param name="priority">此邮件的优先级</param>
           /// <param name="attachments">附件列表</param>
           /// <returns>是否发送成功</returns>
           /// <exception cref="System.ArgumentNullException">attachments</exception>
           public static bool Send(string[] tos, string subject, string mailBody, string[] ccs, string[] bccs, MailPriority priority, params Attachment[] attachments)
           {
               if (attachments == null)
                   throw new ArgumentNullException("attachments");
               if (tos.Length == 0)
                   return false;
               //创建Email实体
               var message = new MailMessage();
               message.From = new MailAddress(SmtpUsername, SmtpDisplayName);
               message.Subject = subject;
               message.Body = mailBody;
               message.BodyEncoding = Encoding.UTF8;
               message.IsBodyHtml = true;
               message.Priority = priority;
   
               //插入附件
               foreach (var attachent in attachments)
               {
                   message.Attachments.Add(attachent);
               }
               //插入收件人地址，抄送地址和密件抄送地址
               foreach (var to in tos.Where(t => !string.IsNullOrEmpty(t)))
               {
                   message.To.Add(new MailAddress(to));
               }
               foreach (var cc in ccs.Where(c => !string.IsNullOrEmpty(c)))
               {
                   message.CC.Add(new MailAddress(cc));
               }
               foreach (var bcc in bccs.Where(bc => !string.IsNullOrEmpty(bc)))
               {
                   message.Bcc.Add(new MailAddress(bcc));
               }
   
               //创建Smtp客户端
               var client = new SmtpClient
               {
                   Host = SmtpServer,
                   Credentials = new NetworkCredential(SmtpUsername, SmtpUserPassword),
                   DeliveryMethod = SmtpDeliveryMethod.Network,
                   EnableSsl = SmtpEnableSsl,
                   Port = SmtpServerPort
               };
   
               //发送邮件
               client.Send(message);
   
               return true;
           }
   
       }