c# SendMail发送邮件实例代码

using system;
using system.collections.generic;
using system.net;
using system.net.mail;
using system.text;

namespace common
{
    /// <summary>
    /// 基于system.net.mail发送邮件，支持附件
    /// </summary>
    public class netsendmail
    {
        public static void mailsend(string mailfrom, string maifromlaccount, string mailfrompwd, string mailsmtpserver, ilist<string> mailto, ilist<string> mailcc, ilist<string> mailbcc, string mailtitle, string mailcontent, ilist<string> mailattachments, system.text.encoding encoding, bool isbodyhtml)
        {
            mailmessage message = new mailmessage();
            if (mailfrom.trim() == "")
            {
                throw new exception("发送邮件不可以为空");
            }
            message.from = new mailaddress(mailfrom);
            if (mailto.count <= 0)
            {
                throw new exception("接收邮件不可以为空");
            }
            foreach (string s in mailto)
            {
                message.to.add(new mailaddress(s));
            }
            if (mailcc.count > 0)
            {
                foreach (string s in mailcc)
                {
                    message.cc.add(new mailaddress(s));
                }
            }
            if (mailbcc.count > 0)
            {
                foreach (string s in mailbcc)
                {
                    message.bcc.add(new mailaddress(s));
                }
            }
            message.subject = mailtitle;
            message.body = mailcontent;
            message.bodyencoding = encoding;   //邮件编码
            message.isbodyhtml = isbodyhtml;      //内容格式是否是html
            message.priority = mailpriority.high;  //设置发送的优先集
            //附件
            foreach (string att in mailattachments)
            {
                message.attachments.add(new attachment(att));
            }
            smtpclient smtpclient = new smtpclient();
            smtpclient.host = mailsmtpserver;
            smtpclient.credentials = new networkcredential(maifromlaccount, mailfrompwd);
            smtpclient.timeout = 1000;
            smtpclient.enablessl = false;        //不使用ssl连接
            smtpclient.send(message);
        }

        public static void mailsendtext(string mailfrom, string maifromlaccount, string mailfrompwd, string mailsmtpserver, ilist<string> mailto, ilist<string> mailcc, ilist<string> mailbcc, string mailtitle, string mailcontent)
        {
            list<string> attlist = new list<string>();
            mailsend(mailfrom, maifromlaccount, mailfrompwd, mailsmtpserver, mailto, mailcc, mailbcc, mailtitle, mailcontent, attlist, encoding.utf8, false);
        }

        public static void mailsendhtml(string mailfrom, string maifromlaccount, string mailfrompwd, string mailsmtpserver, ilist<string> mailto, ilist<string> mailcc, ilist<string> mailbcc, string mailtitle, string mailcontent)
        {
            list<string> attlist = new list<string>();
            mailsend(mailfrom, maifromlaccount, mailfrompwd, mailsmtpserver, mailto, mailcc, mailbcc, mailtitle, mailcontent, attlist, encoding.utf8, true);
        }
    }
}