BllMails.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Mail;
using System.Text;

namespace GroupSendMails_CS
{
   public class BllMails
    {

        
       /// <summary>
       /// 发送邮件
       /// </summary>
       /// <param name="strSmtpServer"></param>
       /// <param name="strFrom"></param>
       /// <param name="strFromPass"></param>
       /// <param name="strto"></param>
       /// <param name="strSubject"></param>
       /// <param name="strBody"></param>
       /// <param name="attachment"></param>
        public void SendSMTPEMail(string strSmtpServer, string strFrom, string strFromPass, string strto, string strSubject, string strBody,string attachment)
        {
            System.Net.Mail.SmtpClient client = new SmtpClient(strSmtpServer);
            client.UseDefaultCredentials = false;
            client.Credentials = new System.Net.NetworkCredential(strFrom, strFromPass);
            client.DeliveryMethod = SmtpDeliveryMethod.Network;

            System.Net.Mail.MailMessage message = new MailMessage(strFrom, strto, strSubject, strBody);
            message.BodyEncoding = System.Text.Encoding.UTF8;
            message.IsBodyHtml = true;
            if (attachment != "")
            {
                Attachment att = new Attachment(attachment);
                message.Attachments.Add(att);
            }
            client.Send(message);
        }
    }
}