工具类SharePoint 发邮件功能

using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Mail;
using Microsoft.SharePoint.Administration;

namespace NewHire
{
    class MailEntity
    {
        internal void SendEmail(string From, string To, string CC, string Subject, string Body, string UserID, string PassWord)
        {
            SmtpClient SC = null;
            MailMessage message = null;
            try
            {
                SC = CreateSmtpClient(UserID, PassWord);
                message = BuildMailMessage(From, To, CC, Subject, Body);
                SC.Send(message);
                message.Dispose();
            }
            catch
            {
                throw;
            }
            finally
            {
                message = null;
                SC = null;
            }
        }

        /// <summary>
        ///  Authenication SmtpClient
        /// </summary>
        /// <param name="UserID">User ID (sys-nyc1-sp)</param>
        /// <param name="PassWord">Password </param>
        /// <returns>return SmtpClient object</returns>
        private SmtpClient CreateSmtpClient(string UserID, string PassWord)
        {
            SmtpClient client = null;
            try
            {
                string smtpServer = SPAdministrationWebApplication.Local.OutboundMailServiceInstance.Server.Address;
                client = new SmtpClient(smtpServer);
                client.Credentials = new System.Net.NetworkCredential(UserID, PassWord);
            }
            catch
            {
                throw;
            }
            return client;
        }

        /// <summary>
        ///  Get MailMessage object 
        /// </summary>
        /// <param name="From">From</param>
        /// <param name="To">To</param>
        /// <param name="CC">CC</param>
        /// <param name="Subject">Subject</param>
        /// <param name="Body">Body</param>
        /// <returns>Return  MailMessage object</returns>
        private MailMessage BuildMailMessage(string From, string To, string CC, string Subject, string Body)
        {
            MailMessage message = new MailMessage();
            try
            {
                message.From = new MailAddress(From);
                message.To.Add(To);
                if (CC != string.Empty)
                    message.CC.Add(CC);
                message.Subject = Subject;
                message.IsBodyHtml = true;
                message.Body = Body;
            }
            catch
            {
                throw;
            }
            return message;
        }

    }
}

 2。 asp.net SSL  默认的端口为465，其代码为：

            MailMessage mess = new MailMessage();
            mess.From = new MailAddress("ggggggghai@163.com");
            //send E-mail Address要正确
            mess.Subject =this.txtTitle.Text.Trim();
            //邮件标题
            mess.IsBodyHtml = true;
            mess.BodyEncoding = System.Text.Encoding.UTF8;
            //邮件编码
            mess.Body = this.txtContent.Text.Trim() ;
            //邮件正文
         
            SmtpClient client = new SmtpClient();
            client.Host = "smtp.163.com";
            //SMTP服务器要正确，经测试，可以使用smtp.sina.com(.cn)    smtp.163.com   smtp.126.com
            if(txtAdd.Text!="")
            {
                mess.Attachments.Add(new Attachment(txtAdd.Text));
            }
            client.Credentials = new System.Net.NetworkCredential("ggggggghai", "123456");
            //需要验证，用户名和密码要正确
            mess.To.Add(new MailAddress(this.txtReceiver.Text.Trim()));
            //接收邮件的邮箱要正确
            try
            {
                client.Send(mess);
                MessageBox.Show("发送成功！");
            }
            catch (Exception ee)
            {
                MessageBox.Show(ee.Message);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.txtSender.Text = "g_zhanhai@163.com";
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            if(openFileDialog1.ShowDialog()==DialogResult.OK)
            {
                txtAdd.Text = openFileDialog1.FileName;
            }
        }