使用MailMessage发送邮件

SmtpClient smtp = new SmtpClient(); //实例化一个SmtpClient
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //将smtp的出站方式设为 Network
            smtp.EnableSsl = false;//smtp服务器是否启用SSL加密
            smtp.Host = "smtp.163.com"; //指定 smtp 服务器地址
            smtp.Port = 25;             //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;
            //如果需要认证,则用下面的方式
            smtp.Credentials = new NetworkCredential("[email protected]", "****");
            MailMessage mm = new MailMessage(); //实例化一个邮件类
            mm.Priority = MailPriority.High; //邮件的优先级,分为 Low, Normal, High,通常用 Normal即可
            mm.From = new MailAddress("[email protected]", "真有意思测试", 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.ReplyTo = new MailAddress("[email protected]", "我的接收邮箱", Encoding.GetEncoding(936));
            //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
            //上面后两个参数的意义, 同 From 的意义
            //mm.CC.Add("[email protected],[email protected],[email protected]");
            //邮件的抄送者,支持群发,多个邮件地址之间用 半角逗号 分开
 
            //当然也可以用全地址,如下:
            mm.CC.Add(new MailAddress("[email protected]", "抄送者A", Encoding.GetEncoding(936)));
            //mm.CC.Add(new MailAddress("[email protected]", "抄送者B", Encoding.GetEncoding(936)));
            //mm.CC.Add(new MailAddress("[email protected]", "抄送者C", Encoding.GetEncoding(936)));
 
            //mm.Bcc.Add("[email protected],[email protected]");
            //邮件的密送者,支持群发,多个邮件地址之间用 半角逗号 分开
 
            //当然也可以用全地址,如下:
            //mm.CC.Add(new MailAddress("[email protected]", "密送者D", Encoding.GetEncoding(936)));
            //mm.CC.Add(new MailAddress("[email protected]", "密送者E", Encoding.GetEncoding(936)));
            //mm.Sender = new MailAddress("[email protected]", "邮件发送者", Encoding.GetEncoding(936));
            //可以任意设置,此信息包含在邮件头中,但并不会验证有效性,也不会显示给收件人
            //说实话,我不知道有啥实际作用,大家可不理会,也可不写此项
            //mm.To.Add("[email protected],[email protected]");
            //邮件的接收者,支持群发,多个地址之间用 半角逗号 分开
 
            //当然也可以用全地址添加
 
            mm.To.Add(new MailAddress("[email protected]", "接收者g", Encoding.GetEncoding(936)));
            //mm.To.Add(new MailAddress("[email protected]", "接收者h", Encoding.GetEncoding(936)));
            mm.Subject = "这是邮件标题-测试"; //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 = "<font color=\"red\">邮件测试,呵呵</font>";
            //邮件正文
            mm.Attachments.Add(new Attachment(@"c:\d\1.doc", System.Net.Mime.MediaTypeNames.Application.Rtf));
            //添加附件,第二个参数,表示附件的文件类型,可以不用指定
            //可以添加多个附件
            //mm.Attachments.Add(new Attachment(@"d:b.doc"));
            smtp.Send(mm); //发送邮件,如果不返回异常, 则大功告成了。
 
 
        }

  二、

using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Mail;
using System.Net;
using System.Configuration;
/// <summary>
/// 发邮件模块
/// Author:tonyepaper.cnblogs.com
/// </summary>
public class Mail
{
    private string senderAddress;
    /// <summary>
    /// 发件人
    /// </summary>
    public string SenderAddress
    {
        get { return senderAddress; }
        set { senderAddress = value; }
    }
    private string receiverAddess;
    /// <summary>
    /// 收件人
    /// </summary>
    public string ReceiverAddess
    {
        get { return receiverAddess; }
        set { receiverAddess = value; }
    }
    private string subject;
    /// <summary>
    /// 主题
    /// </summary>
    public string Subject
    {
        get { return subject; }
        set { subject = value; }
    }
    private string body;
    /// <summary>
    /// 内容
    /// </summary>
    public string Body
    {
        get { return body; }
        set { body = value; }
    }
    private string smtpHost;
    /// <summary>
    /// SMTP主机
    /// </summary>
    public string SmtpHost
    {
        get { return smtpHost; }
        set { smtpHost = value; }
    }
    private int smtpPort;
    /// <summary>
    /// SMTP端口
    /// </summary>
    public int SmtpPort
    {
        get { return smtpPort; }
        set { smtpPort = value; }
    }
    private string smtpPassword;
    /// <summary>
    /// SMTP密码
    /// </summary>
    public string Password
    {
        get { return smtpPassword; }
        set { this.smtpPassword = value; }
    }
    /// <summary>
    /// 初始化发件人
    /// </summary>
    public Mail()
    {
        senderAddress = "[email protected]";
        smtpPassword ="*****";
        smtpHost = "smtp.gmail.com";
        smtpPort = 587;
    }
    /// <summary>
    /// 邮件
    /// </summary>
    /// <param name="receiverAddess">收件人地址</param>
    /// <param name="subject">主题</param>
    /// <param name="body">内容</param>
    public Mail(string receiverAddess, string subject, string body)
        : this()
    {
        this.receiverAddess = receiverAddess;
        this.subject = subject;
        this.body = body;
    }
    /// <summary>
    /// 发送邮件
    /// </summary>
    public bool Send()
    {
        MailMessage mailMessage = new MailMessage(senderAddress, receiverAddess);
        mailMessage.Subject = subject;
        mailMessage.Body = body;

        SmtpClient smtpClient = new SmtpClient(smtpHost, smtpPort);
        //使用SSL加密连线
        smtpClient.EnableSsl = true;
        NetworkCredential networkCredential = new NetworkCredential(senderAddress, smtpPassword);
        smtpClient.Credentials = networkCredential;
        try
        {
            smtpClient.Send(mailMessage);
            return true;
        }
        catch (Exception ex)
        {
            return false;
        }
    }   

//调用
protected void Button1_Click(object sender, EventArgs e)
    {
        Mail mail = new Mail("[email protected]", "aaaa", "aaaaaa");//初始化收件人
        mail.Send();
            }

  

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