C# 或 Asp.net 2.0 邮件发送模块（亲测）

using System.Net.Mail;
using System.Net;

public class Mail
    {
        MailMessage mm;
        SmtpClient sc;
        MailConf mc;
        public Mail()
        {
            mc = new MailConf();
            sc = new SmtpClient();
        }
        public bool SendMail(string[] To,string Title,string Context)
        {
            mm = new MailMessage();
            mm.IsBodyHtml = false;
            mm.Subject = Title;
            mm.Body = Context;
            foreach (string str in To)
                mm.To.Add(new MailAddress(str));
            while (mc.Next())
            {
                sc.Host = mc.SmtpHost;
                mm.From = new MailAddress(mc.MailAddressFrom);
                sc.Credentials = new System.Net.NetworkCredential(mc.User, mc.Pwd);
                if (Send())
                    return true;
            }
            return false;
        }
        private bool Send()
        {
            try
            {
                sc.Send(mm);
                return true;
            }
            catch { return false; }
        }
    }

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若mm.IsBodyHtml = true;则可以增加mm.BodyEncoding = System.Text.Encoding.UTF8;
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MailConf 是我自己写的一个class，用于保存一系列的邮件帐号，其中：

SmtpHost                          eg："smtp.126.com"

MailAddressFrom             eg："bluelotus7@baidu.com"

User                                 eg："bluelotus7"

Pwd                                  eg："123456"

注意：MailAddressFrom的用户名必须和User中值相对应，不然会异常