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 = "Angel_asp@126.com";
            //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);
        }
    }