C#写的 电子邮件客户端（winform窗体）

如果用QQ邮箱测试需要在邮箱里面设置里面开启POPSMTP协议。并用获取授权码输入到密码框。

添加引用

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

 实例化：MailMessage mmsg = new MailMessage();

        /// <summary>
        /// 发送电子邮件
        /// </summary>
        /// <param name="sendEmailAddress">发件人邮箱地址</param>
        /// <param name="sendEmailPwd">发件人邮箱密码授权码</param>
        /// <param name="msgToEmail">收件人邮箱地址</param>
        /// <param name="title">邮箱标题</param>
        /// <param name="content">邮件内容</param>
        /// <param name="host">邮箱服务器</param>
        /// <returns></returns>
        public int SendEmail(string sendEmailAddress, string sendEmailPwd, string msgToEmail, string title, string content, string host)
        {
            //发件者邮箱地址
            string fjrtxt = sendEmailAddress;
            //发件者邮箱密码
            string mmtxt = sendEmailPwd;
            //主题
            string zttxt = title;
            //内容
            string nrtxt = content;
            string[] fasong = fjrtxt.Split('@');
            //设置邮件协议
            SmtpClient client = new SmtpClient(host);

            client.EnableSsl = true;

            client.UseDefaultCredentials = false;
            //通过网络发送到Smtp服务器
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            //通过用户名和密码 认证
            client.Credentials = new NetworkCredential(fasong[0].ToString(), mmtxt);
            //发件人和收件人的邮箱地址
            //   MailMessage mmsg = new MailMessage();        //表示电子邮件: MailMessage

            mmsg.From = new MailAddress(fjrtxt);         //邮件地址 ：MailAddress

            mmsg.To.Add(new MailAddress(msgToEmail));
            //邮件主题
            mmsg.Subject = zttxt;
            //主题编码
            mmsg.SubjectEncoding = Encoding.UTF8;
            //邮件正文
            mmsg.Body = nrtxt;
            //正文编码
            mmsg.BodyEncoding = Encoding.UTF8;
            //设置为HTML格式
            mmsg.IsBodyHtml = true;
            //优先级
            mmsg.Priority = MailPriority.High;
            try
            {
                client.Send(mmsg);
                return 1;
            }
            catch
            {
                return 0;
            }
        }
        

上传附件

        private void 上传附件button1_Click(object sender, EventArgs e)
        {
            // MailMessage mm = new MailMessage();
            OpenFileDialog openFile = new OpenFileDialog();
            if (openFile.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                mmsg.Attachments.Add(new Attachment(openFile.FileName));
                this.fujian.Text = openFile.FileName;
            }
        }

发送按钮

 private void 发送button2_Click(object sender, EventArgs e)
        {
            int mesAge = SendEmail(fajianren.Text, mima.Text, shoujianren.Text, biaoti.Text, neirong.Text, "smtp.qq.com");//mima就是授权码
            if (mesAge == 1)
                MessageBox.Show("发送成功！");
            else
                MessageBox.Show("发送失败！");
        }

有问题可以留言