net2.0后，C#可以利用System.Net发送邮件了。
代码整理如下：
3. 增加IProcessMessage类，定义了一个消息方法，用于消息传递
/**************************************
* <copyright file="SendEail.cs">
* Copyright(c)2014 LeeStudio All rights reserved.
* CLR版本：4.0.30319.17929
* 开发团队：欺心伴月个人工作室
* 技术博客：http://www.cnblogs.com/lichunyang/
* 所属工程：LeeStudio.Basic
* 创 建 者：Frank Lee
* 修改时间：2014-02-20 11:20
* </copyright>
**************************************/ using System;
using System.Text;
using System.Net;
using System.Net.Mail;
using System.Net.Mime; namespace LeeStudio.Basic
{
/// <summary>
/// 邮件发送类
/// </summary>
public class SendEmail
{
private MailMessage mailMessage = new MailMessage(); //实例化一个邮件类 #region 构造函数
/// <summary>
/// 构造函数
/// </summary>
/// <param name="toAddresses">收件人地址（多个以,号分开）</param>
/// <param name="fromAddress">发件人地址</param>
/// <param name="title">主题</param>
/// <param name="body">正文</param>
public SendEmail(string toAddresses, string fromAddress, string title, string body)
: this(toAddresses, fromAddress, "", "", title, body, false)
{
} /// <summary>
/// 构造函数
/// </summary>
/// <param name="toAddress">收件人地址</param>
/// <param name="fromAddress">发件人地址</param>
/// <param name="toName">收件人名字</param>
/// <param name="fromName">发件人姓名</param>
/// <param name="title">主题</param>
/// <param name="body">正文</param>
/// <param name="isBodyHtml">正文是否为html格式</param>
public SendEmail(string toAddress, string fromAddress, string toName, string fromName, string title, string body, bool isBodyHtml)
{
mailMessage.From = new MailAddress(fromAddress, fromName, Encoding.GetEncoding());
if (toName.Equals(""))
mailMessage.To.Add(toAddress);
else
mailMessage.To.Add(new MailAddress(toAddress, toName, Encoding.GetEncoding())); mailMessage.Subject = title;
mailMessage.SubjectEncoding = Encoding.GetEncoding(); mailMessage.Body = body;
mailMessage.IsBodyHtml = isBodyHtml;
mailMessage.BodyEncoding = Encoding.GetEncoding();
}
#endregion /// <summary>
/// 设置SMTP，并且将邮件发送出去
/// 所有参数都设置完成后再调用该方法
/// </summary>
/// <param name="password">发件人密码</param>
/// <param name="smtpHost">SMTP服务器地址</param>
public void SetSmtp(string password, string smtpHost)
{
SetSmtp(mailMessage.From.Address, password, smtpHost, , false, MailPriority.Normal);
} /// <summary>
/// 设置SMTP，并且将邮件发送出去
/// 所有参数都设置完成后再调用该方法
/// </summary>
/// <param name="address">发件人地址（必须为真实有效的email地址）</param>
/// <param name="password">发件人密码</param>
/// <param name="smtpHost">SMTP服务器地址</param>
/// <param name="smtpPort">SMTP服务器的端口</param>
/// <param name="isEnableSsl">SMTP服务器是否启用SSL加密</param>
/// <param name="priority">邮件的优先级</param>
public void SetSmtp(string address, string password, string smtpHost, int smtpPort, bool isEnableSsl, MailPriority priority)
{
SmtpClient smtp = new SmtpClient();
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Credentials = new NetworkCredential(address, password);
smtp.Host = smtpHost;
smtp.Port = smtpPort;
smtp.EnableSsl = isEnableSsl; mailMessage.Priority = priority;
smtp.Send(mailMessage); //发送邮件
} #region //设置邮件地址
/// <summary>
/// 设置更多收件人
/// </summary>
/// <param name="toAddresses">收件人地址</param>
public void SetMoreToAddress(string toAddresses)
{
mailMessage.To.Add(toAddresses);
} /// <summary>
/// 设置更多收件人
/// </summary>
/// <param name="toAddresses">收件人地址</param>
/// <param name="toName">收件人名字</param>
public void SetMoreToAddress(string toAddress, string toName)
{
mailMessage.To.Add(new MailAddress(toAddress, toName, Encoding.GetEncoding()));
} /// <summary>
/// 设置抄送者（多个以,号分开）
/// </summary>
/// <param name="ccAddresses">抄送者地址</param>
public void SetCarbonCopyFor(string ccAddresses)
{
mailMessage.CC.Add(ccAddresses);
} /// <summary>
/// 设置抄送者
/// </summary>
/// <param name="ccAddress">抄送者地址</param>
/// <param name="ccName">抄送者名字</param>
public void SetCarbonCopyFor(string ccAddress, string ccName)
{
mailMessage.Bcc.Add(new MailAddress(ccAddress, ccName, Encoding.GetEncoding()));
} /// <summary>
/// 设置密送者（多个以,号分开）
/// </summary>
/// <param name="bccAddresses">密送者</param>
public void SetBlindCarbonCopyFor(string bccAddresses)
{
mailMessage.Bcc.Add(bccAddresses);
} /// <summary>
/// 设置密送者
/// </summary>
/// <param name="bccAddress">密送者</param>
/// <param name="bccName">密送者名字</param>
public void SetBlindCarbonCopyFor(string bccAddress, string bccName)
{
mailMessage.Bcc.Add(new MailAddress(bccAddress, bccName, Encoding.GetEncoding()));
}
#endregion #region 添加附件
/// <summary>
/// 添加附件（自动识别文件类型）
/// </summary>
/// <param name="fileName">单个文件的路径</param>
public void Attachments(string fileName)
{
mailMessage.Attachments.Add(new Attachment(fileName));
} /// <summary>
/// 添加附件（默认为富文本RTF格式）
/// </summary>
/// <param name="fileName">单个文件的路径</param>
public void AttachmentsForRTF(string fileName)
{
mailMessage.Attachments.Add(new Attachment(fileName, MediaTypeNames.Application.Rtf));
}
#endregion
}
}
调用是按照需求，*设置参数。
using LeeStudio.Basic; private void SendEmail()
{
#region 最简设置
//SendEmail se = new SendEmail("*****@****.com", "****@163.com", "title", "body");
//se.SetSmtp("password", "smtp.163.com"); //必须在所有参数设置完后调用此方法
#endregion #region 完全设置
//string toAddresses = "***@**.**,***@**.**";
//string toNames = "frank,lee"; //SendEmail se = new SendEmail("to@**.**", "from@**.**", "toname", "fromname","title", "body", false);
//se.SetMoreToAddress("to@**.**", "toName");
//se.SetCarbonCopyFor("cc@**.**");
//se.SetBlindCarbonCopyFor("bcc@**.**"); //string filePath = Request.PhysicalApplicationPath + "/file/SendEmail.txt";
//se.Attachments(filePath);
//filePath = Request.PhysicalApplicationPath + "/file/RTF文件.docx";
//se.AttachmentsForRTF(filePath);
//se.SetSmtp("email", "password", "smtp", 25, true, System.Net.Mail.MailPriority.Normal); //必须在所有参数设置完后调用此方法
#endregion
}
遗留问题：
当有多个收件人/抄送者/密送者时，如何快速处理？之前的做法是让用户输入字符串，再将字符串一一对应匹配，代码如下：
/// <summary>
/// 将邮件地址和名称加入到锯齿数组中
/// </summary>
/// <param name="addrs">邮件地址（多个以,号分开）</param>
/// <param name="names">名称（多个以,号分开）</param>
/// <returns>地址和名称数组</returns>
private string[][] SetNameList(string addrs, string names)
{
string[][] result = new string[][]; string[] addr = addrs.Split(',');
string[] name = names.Split(',');
result[] = new string[addr.Length];
result[] = new string[name.Length]; for (int i = ; i < addr.Length; i++)
result[][i] = addr[i];
for (int i = ; i < name.Length; i++)
result[][i] = name[i]; return result;
}
首先这个方法就很奇葩，其次，只要用户输入的个数不对应，又要做一堆的异常处理。