C# 发送邮件

Question

我想用C#语句编一个可以往邮箱里邮件的一个小程序,有会的请告诉我一声,谢谢啦,请高人指点一下

Answer 1

//要引用System.Web.Mail命名空间。引用该命名空间需要添加System.Web.Dll MailMessage mail = new MailMessage();
    mail.BodyFormat=MailFormat.Html;
    mail.From ="some@server";
    mail.To="some@server";//多个收件人之间用分号分割
    mail.Bcc="some@server";//密送
    mail.Cc=="some@server";//抄送
    mail.Subject = "this is mail subject";
    mail.Body ="this is mail body";
    mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
    mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "username"); 
    mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "password);  
   
    System.Web.Mail.MailAttachment attachment=new MailAttachment("c:\\1.txt");
    mail.Attachments.Add(attachment);
    SmtpMail.SmtpServer = "10.2.140.100";
    SmtpMail.Send(mail); 

Answer 2

楼上代码只能用于asp.net中,如果是c/s,只能封装到Web服务中,来调用实现.

Answer 3

我现在using System.W0eb;能点出来,我想点using System.Web.Mail;现在点不出来也不知道是什么原因,有哪位高人知道是什么原因吗?请指点一下

Answer 4

http://blog.csdn.net/tianzhenjing/archive/2006/12/22/1454413.aspx

Answer 5

CS下同样有个发送接受邮件的命名控件using System.Net.Mail;
使用很简单，查查MSDN就行了

Answer 6

用JMAIL现成组件，什么都设计好了，设置好属性就能发了。不光能发还能收邮件。从pop3服务器里把邮件读取回来。打个广告，我资源里有，要的话去下吧。 

Answer 7

http://topic.csdn.net/u/20080301/17/18568a4c-0c34-4bad-b0c5-08bc16a297ef.html

Answer 8

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();
    }    protected void Timer1_Tick(object sender, EventArgs e)
    {
        if (DateTime.Now.Second % 20 == 0)
        {
             CreateMessageWithAttachment("smtp.163.com");
        }
    }

Answer 9

给你写个最简单最详细的using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace smtp1
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                TcpClient smtpclient = new TcpClient();
                smtpclient.Connect(IPAddress.Parse("127.0.0.1"), 25);//连接到服务端
                NetworkStream ns = smtpclient.GetStream();
                string result = Receive(ns);
                Console.Write(result);
                send(ns, "helo\r\n");//首先必须跟服务器发送此标记
                result = Receive(ns);
                Console.Write(result);
                //身份验证
                send(ns, "Auth Login\r\n");
                result = Receive(ns);//服务器返回一条让你输入用户名的指令，此返回为base64
                Console.Write(ConverToString(result.Substring(result.IndexOf(' ')+1))+"\r\n");
                if (result.StartsWith("334"))
                {
                    //输入用户名
                    send(ns, ConvertToBase64("gg") + "\r\n");//(因为用到了esmtp,它有个身份验证,是以base64来表示的)要想以base64输出，必须先转换成byte[],在从byte[]转换回base64
                    result = Receive(ns);///服务器返回一条让你输入密码的指令，此返回为base64
                    Console.Write(ConverToString(result.Substring(result.LastIndexOf(' ') + 1))+"\r\n");
                    //Console.Write(result);
                    //输入密码
                    send(ns, ConvertToBase64("gg") + "\r\n");
                    result = Receive(ns);
                    Console.Write(result);
                    if (result.StartsWith("235"))
                    {
                        Console.WriteLine("从现在开始可以正常收发邮件了！");
                        send(ns, "Mail From:<[email protected]>\r\n");
                        result = Receive(ns);
                        Console.Write(result);
                        if (result.StartsWith("250"))
                        {
                            send(ns, "RCPT To:<[email protected]>\r\n");
                            result = Receive(ns);
                            Console.Write(result);
                            ///////这里可以发送给多个人,服务器属于双项的，你发出去服务器也会给你返回一条，必须去接收
                            send(ns, "RCPT To:<[email protected]>\r\n");
                            result = Receive(ns);
                            Console.Write(result);
                            if (result.StartsWith("250"))
                            {
                                send(ns, "DATA\r\n");
                                result = Receive(ns);
                                Console.Write(result);
                                if (result.StartsWith("354"))
                                {
                                    string content = null;
                                    //content+ = "From:<[email protected]>\r\n";
                                    //content += "To:<[email protected]>\r\n";
                                    //content += "Date:" + DateTime.Now.ToString()+"\r\n";
                                    //content += "Subject:我是主题\r\n";
                                    //content += "Cc:[email protected]\r\n";
                                    //content += "\r\n";
                                    //content += "我是邮件的正文内容\r\n";
                                    content += ".\r\n";
                                    send(ns, content);
                                    result = Receive(ns);
                                    Console.Write(result);
                                    if (result.StartsWith("250"))
                                    {
                                        Console.Write("发送成功！");
                                    }
                                }
                            }
                        }
                    }
                }
            }
            catch
            {
                Console.WriteLine("连接失败！");
            }
        }
        #region 接收
        static string Receive(NetworkStream ns)
        {
            byte[] data=new byte[1024];
            int size = ns.Read(data,0,1024);
            return Encoding.UTF8.GetString(data,0,size);
        }
        #endregion
        #region 发送
        static void send(NetworkStream ns,string msg)
        {
            byte[] data = Encoding.UTF8.GetBytes(msg);
            ns.Write(data,0,data.Length);
            ns.Flush();
        }
        #endregion
        static string ConvertToBase64(string str)
        {
            byte[] data = Encoding.UTF8.GetBytes(str);
            return Convert.ToBase64String(data);
        }
        static string ConverToString(string str)
        {
            byte[] data = Convert.FromBase64String(str);
            return Encoding.UTF8.GetString(data);
        }
    }
}

Answer 10

http://www.coridc.com/archives/2120这里有详细介绍及代码