asp.net C#发送邮件类

很久前写的一个简单邮件发送类分享给大家：

 using System;
 using System.Data;
 using System.Configuration;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Web.UI.HtmlControls;
 using System.Net.Mail;

     /// <summary>
     /// 发送 E-mail 帮助类
     /// </summary>
     public class EmailHelper
     {
         //发送邮件的帐号
         private string from = "";
         //接收邮件的帐号
         private string to = "";
         //smtp服务器地址
         private string smtp = "";
         //发送邮件帐号的密码
         private string fromPWD = "";
         private string subject = "";
         private string body = "";

         public EmailHelper(string sTo, string sSubject, string sBody)
         {
             //this.from = "[e-mail]";
             //this.fromPWD = "Angelasp.com";
             //this.smtp = "mail.126.com";

             this.to = sTo;
             this.subject = sSubject;
             this.body = sBody;
         }
         public EmailHelper(string sFrom, string sTo, string sSmtp, string sFromPWD, string sSubject, string sBody)
         {
             //
             // TODO: 在此处添加构造函数逻辑
             //
             this.from = sFrom;
             this.to = sTo;
             this.smtp = sSmtp;
             this.fromPWD = sFromPWD;
             this.subject = sSubject;
             this.body = sBody;
         }
         /// <summary>
         /// 发送邮件
         /// </summary>
         public void SendMail()
         {
             MailAddress mailTOAddr = new MailAddress(this.to);
             MailAddress mailFromAddr = new MailAddress(this.from);
             MailMessage mail = new MailMessage(mailFromAddr, mailTOAddr);
             mail.Subject = this.subject;
             mail.IsBodyHtml = true;

             //mail.
             mail.Body = this.body;
             SmtpClient smtpMail = new SmtpClient(this.smtp);
             smtpMail.Credentials = new System.Net.NetworkCredential(this.from, this.fromPWD);
             //smtpMail.EnableSsl = true; //不支持SSL
             smtpMail.Send(mail);
         }
     }