下面用到的郵件賬號和密碼都不是真實的，需要測試就換成自己的郵件賬號。需要引用： using System.Net.Mail; using System.Text; using System.Net;程序代碼：MailMessage myMail = new MailMessage(); //創建郵件實例對象myMail.From = new MailAddress(""); //發送者，要和郵件服務器的驗證信息對應，不能隨便更改myMail.To.Add(new MailAddress("")); //接收者myMail.Subject = "C#發送Email"; //郵件標題myMail.SubjectEncoding = Encoding.UTF8; //標題編碼myMail.Body = "this is a test email!"; //郵件內容myMail.BodyEncoding = Encoding.UTF8; //郵件內容編碼myMail.IsBodyHtml = true; //郵件內容是否支持htmlSmtpClient smtp = new SmtpClient(); //創建smtp實例對象smtp.Host = "mail.sina.com"; //郵件服務器SMTPsmtp.Port = 25; //郵件服務器端口smtp.Credentials = new NetworkCredential("", "123456"); //郵件服務器驗證信息smtp.Send(myMail); //發送郵件使用Gmail郵箱發送郵件示例MailMessage myMail = new MailMessage();myMail.From = new MailAddress("");myMail.To.Add(new MailAddress(""));myMail.Subject = "C#發送Email";myMail.SubjectEncoding = Encoding.UTF8;myMail.Body = "this is a test email from gmail!<a href='http://www.sina.com.cn'>sina</a>";myMail.BodyEncoding = Encoding.UTF8;myMail.IsBodyHtml = true;SmtpClient smtp = new SmtpClient();smtp.Host = "smtp.gmail.com";smtp.Port = 587; //Gmail的smtp端口smtp.Credentials = new NetworkCredential("", "123456");smtp.EnableSsl = true; //Gmail要求SSL連接smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //Gmail的發送方式是通過網絡的方式，需要指定smtp.Send(myMail);使用QQ郵箱發送郵件示例MailMessage myMail = new MailMessage();myMail.From = new MailAddress("");myMail.To.Add(new MailAddress(""));myMail.Subject = "C#發送Email";myMail.SubjectEncoding = Encoding.UTF8;myMail.Body = "this is a test email from QQ!";myMail.BodyEncoding = Encoding.UTF8;myMail.IsBodyHtml = true;SmtpClient smtp = new SmtpClient();smtp.Host = "smtp.qq.com";smtp.Credentials = new NetworkCredential("", "123456");smtp.Send(myMail);

總結

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