邮件发送问题

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="_51aspxMail._Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
 <form id="form1" runat="server">
    <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" width="776">
            <tr>
                <td>
                    <table align="center" border="0" cellpadding="4" cellspacing="1" width="600" bgcolor="#cccccc">
                        <tr>
                            <td colspan="2" bgcolor="#f0f0f0" align="center">
                                邮件发送测试</td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right" width="150">发送人：</td>
                            <td bgcolor="#ffffff" align="left"><asp:TextBox ID="fromMail" runat="server" Width="300" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">收件人：</td>
                            <td bgcolor="#ffffff" align="left"><asp:TextBox ID="toMail" runat="server" Width="300" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">抄送人：</td>
                            <td bgcolor="#ffffff" align="left"><asp:TextBox ID="ccMail" runat="server" Width="300" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">暗送人：</td>
                            <td bgcolor="#ffffff" align="left"><asp:TextBox ID="bccMail" runat="server" Width="300" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">主&nbsp;&nbsp;&nbsp;&nbsp;题：</td>
                            <td bgcolor="#ffffff" align="left"><asp:TextBox ID="subject" runat="server" Width="300" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">附&nbsp;&nbsp;&nbsp;&nbsp;件：</td>
                            <td bgcolor="#ffffff" align="left"><input type="file" id="upfile" runat="server" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">内&nbsp;&nbsp;&nbsp;&nbsp;容：</td>
                            <td bgcolor="#ffffff" align="left"><asp:TextBox ID="body" TextMode="multiLine" runat="server" Width="300" Height="200" /></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" align="right">格&nbsp;&nbsp;&nbsp;&nbsp;式：</td>
                            <td bgcolor="#ffffff" align="left"><asp:RadioButtonList ID="format" runat="server"/></td>
                        </tr>
                        <tr>
                            <td bgcolor="#f0f0f0" colspan="2" align="center">
                                <asp:Button ID="send" runat="server" Text="发送" OnClick="send_Click" />&nbsp;&nbsp;
                                <asp:Button ID="reset" runat="server" Text="重置" />
                            </td>
                        </tr>
                    </table>
                </td>
            </tr>
        </table>
    </div>
    </form></body>
</html>

解决方案 »

  1.   

    后台代码
    using System;
    using System.Data;
    using System.Configuration;
    using System.Collections;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Web.UI.HtmlControls;
    using System.Web.Util;
    using System.Web.Mail;namespace _51aspxMail
    {
        public partial class _Default : System.Web.UI.Page
        {
            protected void Page_Load(object sender, EventArgs e)
            {
                if (!IsPostBack)
                {
                    format.Items.Add(new ListItem("文本", "0"));
                    format.Items.Add(new ListItem("HTML", "1"));
                    format.Items[0].Selected = true;                fromMail.Text = "[email protected]"; //发送方邮件
                    fromMail.Enabled = false;
                }
            }        private bool SendMail(string fromMail, string toMail, string ccMail, string bccMail, string subject, string body, string sendMode)
            {
                try
                {
                 
                    MailMessage Mail = new MailMessage();
                    Mail.From = fromMail;
                    Mail.To = toMail;
                    Mail.Cc = ccMail;
                    Mail.Bcc = bccMail;
                    Mail.Subject = subject;
                    Mail.Body = body;
                    Mail.BodyFormat = sendMode == "0" ? MailFormat.Text : MailFormat.Html;                //附件
                    string ServerFileName = "";
                    if (this.upfile.PostedFile.ContentLength != 0)
                    {
                        string upFileName = this.upfile.PostedFile.FileName;
                        string[] strTemp = upFileName.Split('.');
                        string upFileExp = strTemp[strTemp.Length - 1].ToString();
                        ServerFileName = Server.MapPath(DateTime.Now.ToString("yyyyMMddhhmmss") + "." + upFileExp);
                        this.upfile.PostedFile.SaveAs(ServerFileName);
                        Mail.Attachments.Add(new MailAttachment(ServerFileName));
                    }
                    Mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1);
                    Mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "lijing"); //发送方邮件帐户
                    Mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "123456"); //发送方邮件密码                SmtpMail.SmtpServer = "smtp." + fromMail.Substring(fromMail.IndexOf("@") + 1);
                    SmtpMail.Send(Mail);
                   
                    return true;
                }
                catch
                {
                    return false;
                }
            }        protected void send_Click(object obj, EventArgs e)
            {
                bool flag = SendMail(fromMail.Text, toMail.Text, ccMail.Text, bccMail.Text, subject.Text, body.Text, format.SelectedValue);
                if (flag == true)
                {
                    Response.Write("<script>alert('发送成功!');</script>");
                }
                else
                {
                    Response.Write("<script>alert('发送失败!');</script>");
                }
            }
        }
    }
      

  2.   

      换个服务器发送 ··smtp.sina.com
      

  3.   

    http://blog.csdn.net/abandonship/archive/2008/12/22/3580975.aspx