using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.IO;
using System.Web;
using System.Net.Mail;
using System.Net;
using System.ComponentModel;public class GTMail{#region 发送电子邮件/// <summary>/// 发送电子邮件/// </summary>/// <param name="smtpserver">SMTP服务器</param>/// <param name="userName">登录帐号</param>/// <param name="pwd">登录密码</param>/// <param name="nickName">发件人昵称</param>/// <param name="strfrom">发件人</param>/// <param name="strto">收件人</param>/// <param name="subj">主题</param>/// <param name="bodys">内容</param>public static void sendMail(string smtpserver, string userName, string pwd, string nickName, string strfrom, string strto, string subj, string bodys){SmtpClient _smtpClient = new SmtpClient();_smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式_smtpClient.Host = smtpserver;//指定SMTP服务器_smtpClient.Credentials = new System.Net.NetworkCredential(userName, pwd);//用户名和密码//MailMessage _mailMessage = new MailMessage(strfrom, strto);MailAddress _from = new MailAddress(strfrom, nickName);MailAddress _to = new MailAddress(strto);MailMessage _mailMessage = new MailMessage(_from, _to);_mailMessage.Subject = subj;//主题_mailMessage.Body = bodys;//内容_mailMessage.BodyEncoding = System.Text.Encoding.Default;//正文编码_mailMessage.IsBodyHtml = true;//设置为HTML格式_mailMessage.Priority = MailPriority.Normal;//优先级
            _smtpClient.Send(_mailMessage);}#endregion#region 简单电子邮件发送/// <summary>/// 简单电子邮件发送/// </summary>/// <param name="smtpserver">SMTP服务器</param>/// <param name="userName">登录帐号</param>/// <param name="pwd">登录密码</param>/// <param name="nickName">发件人昵称</param>/// <param name="mailFrom">发件人</param>/// <param name="mailTo">收件人</param>/// <param name="subj">主题</param>/// <param name="bodys">内容</param>public static void sendMail(string smtpserver, int smtpport, string userName, string pwd, string nickName, string mailFrom, string mailTo, string subj, string bodys){SmtpClient _smtpClient = new SmtpClient();_smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式_smtpClient.Host = smtpserver;//指定SMTP服务器_smtpClient.Port = smtpport;_smtpClient.EnableSsl = true;//_smtpClient.SendCompleted += new SendCompletedEventHandler(Smtp_SendCompleted);_smtpClient.Credentials = new NetworkCredential(userName, pwd);//用户名和密码    MailAddress _from = new MailAddress(mailFrom, nickName, Encoding.GetEncoding(936));MailAddress _to = new MailAddress(mailTo);MailMessage _mailMessage = new MailMessage(_from, _to);_mailMessage.Subject = subj;//主题_mailMessage.Body = bodys;//内容_mailMessage.BodyEncoding = Encoding.Default;//正文编码_mailMessage.IsBodyHtml = true;//设置为HTML格式_mailMessage.Priority = MailPriority.Normal;//优先级
            _smtpClient.Send(_mailMessage);//_smtpClient.SendMailAsync(_mailMessage);
        }private static void Smtp_SendCompleted(object sender, AsyncCompletedEventArgs e){string msg = e.UserState.ToString();SmtpClient smtp = (SmtpClient)sender;if (e.Error == null)//问题出现后，这里的Error并没有错误
            {msg += ",1";//发送成功
            }else{msg += ",0";smtp.SendAsyncCancel();}}#endregion#region 邮件批量发送/// <summary>/// 邮件批量发送/// </summary>/// <param name="smtpserver"></param>/// <param name="smtpport"></param>/// <param name="userName"></param>/// <param name="pwd"></param>/// <param name="mailFrom"></param>/// <param name="nickName"></param>/// <param name="mailTo"></param>/// <param name="subj"></param>/// <param name="bodys"></param>/// <param name="cc"></param>/// <param name="bcc"></param>/// <param name="mailAttachments"></param>public static void SendMail(string smtpserver, int smtpport, string userName, string pwd, string mailFrom, string nickName, string[] mailTo, string subj, string bodys, string[] cc, string[] bcc, string[] mailAttachments){SmtpClient smtp = new SmtpClient(); //实例化一个SmtpClientsmtp.DeliveryMethod = SmtpDeliveryMethod.Network; //将smtp的出站方式设为 Networksmtp.EnableSsl = false;//smtp服务器是否启用SSL加密smtp.Host = smtpserver; //指定 smtp 服务器地址smtp.Port = smtpport;             //指定 smtp 服务器的端口，默认是25，如果采用默认端口，可省去//如果你的SMTP服务器不需要身份认证，则使用下面的方式，不过，目前基本没有不需要认证的了smtp.UseDefaultCredentials = true;//smtp.SendCompleted += new SendCompletedEventHandler(Smtp_SendCompleted);//如果需要认证，则用下面的方式smtp.Credentials = new NetworkCredential(userName, pwd);MailMessage mm = new MailMessage(); //实例化一个邮件类mm.Priority = MailPriority.Normal; //邮件的优先级，分为 Low, Normal, High，通常用 Normal即可mm.From = new MailAddress(mailFrom, nickName, Encoding.GetEncoding(936));//收件方看到的邮件来源；//第一个参数是发信人邮件地址//第二参数是发信人显示的名称//第三个参数是 第二个参数所使用的编码，如果指定不正确，则对方收到后显示乱码//936是简体中文的codepage值//注：上面的邮件来源，一定要和你登录邮箱的帐号一致，否则会认证失败
mm.ReplyToList.Add(mailFrom);//ReplyTo 表示对方回复邮件时默认的接收地址，即：你用一个邮箱发信，但却用另一个来收信if (cc.Length > 0){mm.CC.Add(string.Join(",", cc));//抄送
            }if (bcc.Length > 0){mm.Bcc.Add(string.Join(",", bcc));//密送
            }if (mailAttachments.Length > 0){for (int i = 0; i < mailAttachments.Length; i++){Attachment objMailAttachment = new Attachment(@mailAttachments[i]);//发送邮件的附件的地址mm.Attachments.Add(objMailAttachment);//将附件附加到邮件消息对象中
                }}mm.To.Add(string.Join(",", mailTo));mm.Subject = subj; //邮件标题mm.SubjectEncoding = Encoding.GetEncoding(936);// 这里非常重要，如果你的邮件标题包含中文，这里一定要指定，否则对方收到的极有可能是乱码。// 936是简体中文的pagecode，如果是英文标题，这句可以忽略不用mm.IsBodyHtml = true; //邮件正文是否是HTML格式
mm.BodyEncoding = Encoding.GetEncoding(936);//邮件正文的编码， 设置不正确， 接收者会收到乱码
mm.Body = bodys;//邮件正文
            smtp.Send(mm);//smtp.SendMailAsync(mm); //发送邮件，如果不返回异常， 则大功告成了。
        }#endregion }