高分！！！如何用SMTP发送邮件

http://www.systemnetmail.com/

*****************************************************************************
欢迎使用CSDN论坛专用阅读器 : CSDN Reader(附全部源代码)
http://feiyun0112.cnblogs.com/

public static void CreateTimeoutTestMessage(string server)
{
    string to = "[email protected]";
    string from = "[email protected]";
    string subject = "Using the new SMTP client.";
    string body = @"Using this new feature, you can send an e-mail message from an application very easily.";
    MailMessage message = new MailMessage(from, to, subject, body);
    SmtpClient client = new SmtpClient(server);
    Console.WriteLine("Changing time out from {0} to 100.", client.Timeout);
    client.Timeout = 100;
    // Credentials are necessary if the server requires the client
    // to authenticate before it will send e-mail on the client's behalf.
    client.Credentials = CredentialCache.DefaultNetworkCredentials;
    client.Send(message);
}

或者上网找一些发邮件的组件，比如JMail，是Com组件，功能很强大，使用方便，而且可以用密码

都不想发代码了，网上一搜一大堆.aspx
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table id="TABLE1" runat="server" border="0" cellpadding="0" cellspacing="0">
            <tr>
                <td style="width: 393px">
                    收信:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
                    主题:<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />
                    内容:<asp:TextBox ID="TextBox3" runat="server" Height="154px" TextMode="MultiLine"
                        Width="336px"></asp:TextBox><br />
                    <asp:Button ID="Button1" runat="server" Text="发送" OnClick="Button1_Click" /></td>
            </tr>
        </table>

    </div>
        <table id="Table2" runat="server" border="0" cellpadding="0" cellspacing="0" visible="false">
            <tr>
                <td align="center" style="width: 400px">
                    <asp:Label ID="Label1" runat="server" ForeColor="Red" Text="恭喜您，发表成功!"></asp:Label><br />
                    <asp:Button ID="Button2" runat="server" Text="返回" OnClick="Button2_Click" /></td>
            </tr>
        </table>
    </form>
</body>
</html>
.aspx.cs
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.Net;
using System.Net.Mail;
public partial class sendMail : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
          ////设置发件人信箱,及显示名字
        MailAddress from = new MailAddress("[email protected]", "J.L.C");
        //设置收件人信箱,及显示名字
        MailAddress to = new MailAddress(TextBox1.Text, "JLC");
        //创建一个MailMessage对象
        MailMessage oMail = new MailMessage(from, to);         oMail.Subject = TextBox2.Text;      //邮件标题
        oMail.Body = TextBox3.Text;         //邮件内容        oMail.IsBodyHtml = true;            //指定邮件格式,支持HTML格式
        oMail.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");//邮件采用的编码
        oMail.Priority = MailPriority.High;//设置邮件的优先级为高        //发送邮件服务器
        SmtpClient client = new SmtpClient();
        client.Host = "smtp.126.com";    //指定邮件服务器
        client.Credentials = new NetworkCredential("[email protected]", "jlc3509589934");//指定服务器邮件,及密码        //发送
        try
        {
            client.Send(oMail);  //发送邮件
            Label1.Text = "恭喜你！邮件发送成功。";
        }
        catch
        {
            Label1.Text = "邮件发送失败，检查网络及信箱是否可用。";
        }        oMail.Dispose();        //释放资源        TABLE1.Visible = false;
        Table2.Visible = true;
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        //返回，继续发送
        Response.Redirect(Request.Url.ToString());
        TABLE1.Visible = true;
        Table2.Visible = false;
    }
}

建议用jmail!参考
jmail.MessageClass oJmailMessage = new jmail.MessageClass();//建立发邮件类 oJmailMessage.Charset = "GB2312";// 字符集
oJmailMessage.Encoding = "BASE64";//附件的编码格式
oJmailMessage.ContentType = "text/html";
oJmailMessage.ISOEncodeHeaders = false;//是否将信头编码成iso-8859-1字符集
oJmailMessage.Priority = Convert.ToByte(1);// 优先级

oJmailMessage.From = TxtEmail.Text.Trim();//发送人邮件地址
oJmailMessage.FromName = TxtName.Text.Trim();//发送人姓名
oJmailMessage.Subject = txtSubject.Text.Trim();// 邮件主题
oJmailMessage.MailServerUserName = TxtSmtpUser.Text.Trim();//身份验证的用户名
oJmailMessage.MailServerPassWord = TxtSmtpPwd.Text.Trim();//用户密码 //添加一个收件人，抄送人和密送人的添加和该方法是一样的，只是分别使用AddRecipientCC和RecipientBCC两个属性
//要是需要添加多个收件人，则重复下面的语句即可。添加多个抄送和密送人的方法一样
oJmailMessage.AddRecipient(txtReciver.Text.Trim(),"","");
if("" != upFile.PostedFile.FileName)
{
string attpath = upFile.PostedFile.FileName;
oJmailMessage.AddAttachment(@attpath,true,attpath.Substring(attpath.LastIndexOf(".")+1,3));//添加附件
}
oJmailMessage.Body = txtContent.Text.Trim();//邮件内容 if(oJmailMessage.Send(TxtSmtServer.Text.Trim(),false))
{
Response.Write("发送成功！");
}
else
{
Response.Write("发送失败，请检查邮件服务器的设置！");
} oJmailMessage = null;

2005里面引用System.net.mailSmtpClient  smtp = new SmtpClient();
smtp.Host = host;  //邮件服务器比如smtp.163.com
smtp.Port = port; //一般是25
System.Net.NetworkCredential userinfo = new System.Net.NetworkCredential(userName, password);//userName 是发件人邮箱用户名或电子邮件地址，password:发件人邮箱密码
smtp.Credentials = userinfo;//声明邮件内容
//发送邮件
                            MailMessage message = new MailMessage();
                            message.From = new MailAddress("发件人地址", "显示的名称", "编码");
                            message.To.Add("收件人地址");
                            message.Subject = subject;//邮件标题
                            message.SubjectEncoding = subjectEncoding; //邮件编码
                            message.Body = body;//邮件内容
                            message.BodyEncoding = bodyEncoding; //内容编码
                            message.IsBodyHtml = isBodyHtml; //是否是HTML格式
                            message.Priority = MailPriority.Normal; //邮件级别
                            message.Sender = new MailAddress("实际发件人");//可不设置
                            message.ReplyTo = new MailAddress("回复地址", "收件人回复时显示的名称", "编码");                            smtp.Send(message);

using System.Net.Mail;
using System.Net.Mime;
using System.Net; public static void CreateMessageWithAttachment(string server)
    {
        // Specify the file to be attached and sent.
        // This example assumes that a file named Data.xls exists in the
        // current working directory.
        string file = @"D:\asdf.txt";
        // Create a message and set up the recipients.
        MailMessage message = new MailMessage(
          "[email protected]",
          "[email protected]",
          "test",
          "no du");         // Create  the file attachment for this e-mail message.
        Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);
        // Add time stamp information for the file.
        ContentDisposition disposition = data.ContentDisposition;
        disposition.CreationDate = System.IO.File.GetCreationTime(file);
        disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
        disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
        // Add the file attachment to this e-mail message.
        message.Attachments.Add(data);
        //Send the message.
        SmtpClient client = new SmtpClient(server);
        // Add credentials if the SMTP server requires them.
        //client.Credentials = CredentialCache.DefaultNetworkCredentials;
        client.UseDefaultCredentials = true;
        client.Credentials = new System.Net.NetworkCredential("username", "password");
        client.Send(message);
        // Display the values in the ContentDisposition for the attachment.
        ContentDisposition cd = data.ContentDisposition;
        Console.WriteLine("Content disposition");
        Console.WriteLine(cd.ToString());
        Console.WriteLine("File {0}", cd.FileName);
        Console.WriteLine("Size {0}", cd.Size);
        Console.WriteLine("Creation {0}", cd.CreationDate);
        Console.WriteLine("Modification {0}", cd.ModificationDate);
        Console.WriteLine("Read {0}", cd.ReadDate);
        Console.WriteLine("Inline {0}", cd.Inline);
        Console.WriteLine("Parameters: {0}", cd.Parameters.Count);
        foreach (DictionaryEntry d in cd.Parameters)
        {
            Console.WriteLine("{0} = {1}", d.Key, d.Value);
        }
        data.Dispose();
    }

~
发邮件尤其是文本的应该比较简单，如果是html的要怎么做呢？

分析一下MIME格式，更改一下邮件报文头部：Content-Type:html/plain

调试易

高分！！！如何用SMTP发送邮件

解决方案 »