请教，怎么在程序中发邮件

请问，如何在程序中发邮件
如何在程序中发邮件呢？

比如，变量x的值等于5时，就向某个邮箱发邮件
谢谢！

[解决办法]

C# code

  /// <summary>         /// 发送电子邮件         /// </summary>         /// <param name="MessageTo">收件人邮箱地址</param>         /// <param name="MessageSubject">邮件主题</param>         /// <param name="MessageBody">邮件内容</param>         /// <returns></returns>         public static bool Send(List<string> MessageTo, string MessageSubject, string MessageBody)        {            MailMessage message = new MailMessage();            message.From = new MailAddress(MailAccount);            MessageTo.ForEach(m => message.To.Add(m));            message.Subject = MessageSubject;            message.Body = MessageBody;            message.IsBodyHtml = true;            message.Priority = MailPriority.Normal;            SmtpClient sc = new SmtpClient();            sc.Host = MailHost;            sc.Port = MailPort;            sc.Credentials = new System.Net.NetworkCredential(MailAccount, MailPassword);            try            {                sc.Send(message);            }            catch (OtherException ex)            {                throw (ex);            }            return true;        }
[解决办法]
C# code
System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();client.Host = "smtp.163.com";//使用163的SMTP服务器发送邮件client.UseDefaultCredentials = true;client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;client.Credentials = new System.Net.NetworkCredential("abc", "*******");//163的SMTP服务器需要用163邮箱的用户名和密码作认证，如果没有需要去163申请个,                                                                        //这里假定你已经拥有了一个163邮箱的账户，用户名为abc，密码为*******System.Net.Mail.MailMessage Message = new System.Net.Mail.MailMessage();Message.From = new System.Net.Mail.MailAddress("abc@163.com");//这里需要注意，163似乎有规定发信人的邮箱地址必须是163的，而且发信人的邮箱用户名必须和上面SMTP服务器认证时的用户名相同                                                              //因为上面用的用户名abc作SMTP服务器认证，所以这里发信人的邮箱地址也应该写为abc@163.comMessage.To.Add("123456@gmail.com");//将邮件发送给GmailMessage.To.Add("123456@qq.com");//将邮件发送给QQ邮箱Message.Subject = "测试标题";Message.Body = "测试邮件内容";Message.SubjectEncoding = System.Text.Encoding.UTF8;Message.BodyEncoding = System.Text.Encoding.UTF8;Message.Priority = System.Net.Mail.MailPriority.High;Message.IsBodyHtml = true;client.Send(Message);