C#实现邮件发送的功能

Ø  发送邮件所用的核心知识点 

•   微软封装好的MailMessage类：主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）
•   微软封装好的SmtpClient类：主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）
•   SmtpClient主要进行了三层的封装：Socket --> TcpClient --> SmtpClient

Ø  具体代码请看如下所示：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net.Mail;using System.Net.Mime;using System.IO;using System.Timers;using System.Xml;namespace MyEmailTest{    class Program    {        static void Main(string[] args)        {            try            {                //smtp.163.com                string senderServerIp = "123.125.50.133";                //smtp.gmail.com                //string senderServerIp = "74.125.127.109";                //smtp.qq.com                //string senderServerIp = "58.251.149.147";                //string senderServerIp = "smtp.sina.com";                string toMailAddress = "[e-mail]";                string fromMailAddress = "[e-mail]";                string subjectInfo = "Test sending e_mail";                string bodyInfo = "Hello Eric, This is my first testing e_mail";                string mailUsername = "mingmingruyuedlut";                 string mailPassword = ".........."; //发送邮箱的密码（）                string mailPort = "25";                string attachPath = "E:\\123123.txt; E:\\haha.pdf";                MyEmail email = new MyEmail(senderServerIp, toMailAddress, fromMailAddress, subjectInfo, bodyInfo, mailUsername, mailPassword, mailPort, false, false);                email.AddAttachments(attachPath);                email.Send();            }            catch (Exception ex)            {                Console.WriteLine(ex.ToString());            }        }    }    public class MyEmail    {        private MailMessage mMailMessage;   //主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）        private SmtpClient mSmtpClient; //主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）        private int mSenderPort;   //发送邮件所用的端口号（htmp协议默认为25）        private string mSenderServerHost;    //发件箱的邮件服务器地址（IP形式或字符串形式均可）        private string mSenderPassword;    //发件箱的密码        private string mSenderUsername;   //发件箱的用户名（即@符号前面的字符串，例如：[e-mail]，用户名为：hello）        private bool mEnableSsl;    //是否对邮件内容进行socket层加密传输        private bool mEnablePwdAuthentication;  //是否对发件人邮箱进行密码验证        ///<summary>        /// 构造函数        ///</summary>        ///<param name="server">发件箱的邮件服务器地址</param>        ///<param name="toMail">收件人地址（可以是多个收件人，程序中是以“;"进行区分的）</param>        ///<param name="fromMail">发件人地址</param>        ///<param name="subject">邮件标题</param>        ///<param name="emailBody">邮件内容（可以以html格式进行设计）</param>        ///<param name="username">发件箱的用户名（即@符号前面的字符串，例如：[e-mail]，用户名为：hello）</param>        ///<param name="password">发件人邮箱密码</param>        ///<param name="port">发送邮件所用的端口号（htmp协议默认为25）</param>        ///<param name="sslEnable">true表示对邮件内容进行socket层加密传输，false表示不加密</param>        ///<param name="pwdCheckEnable">true表示对发件人邮箱进行密码验证，false表示不对发件人邮箱进行密码验证</param>        public MyEmail(string server, string toMail, string fromMail, string subject, string emailBody, string username, string password, string port, bool sslEnable, bool pwdCheckEnable)        {            try            {                mMailMessage = new MailMessage();                mMailMessage.To.Add(toMail);                mMailMessage.From = new MailAddress(fromMail);                mMailMessage.Subject = subject;                mMailMessage.Body = emailBody;                mMailMessage.IsBodyHtml = true;                mMailMessage.BodyEncoding = System.Text.Encoding.UTF8;                mMailMessage.Priority = MailPriority.Normal;                this.mSenderServerHost = server;                this.mSenderUsername = username;                this.mSenderPassword = password;                this.mSenderPort = Convert.ToInt32(port);                this.mEnableSsl = sslEnable;                this.mEnablePwdAuthentication = pwdCheckEnable;            }            catch (Exception ex)            {                Console.WriteLine(ex.ToString());            }        }        ///<summary>        /// 添加附件        ///</summary>        ///<param name="attachmentsPath">附件的路径集合，以分号分隔</param>        public void AddAttachments(string attachmentsPath)        {            try            {                string[] path = attachmentsPath.Split(';'); //以什么符号分隔可以自定义                Attachment data;                ContentDisposition disposition;                for (int i = 0; i < path.Length; i++)                {                    data = new Attachment(path[i], MediaTypeNames.Application.Octet);                    disposition = data.ContentDisposition;                    disposition.CreationDate = File.GetCreationTime(path[i]);                    disposition.ModificationDate = File.GetLastWriteTime(path[i]);                    disposition.ReadDate = File.GetLastAccessTime(path[i]);                    mMailMessage.Attachments.Add(data);                }            }            catch (Exception ex)            {                Console.WriteLine(ex.ToString());            }        }        ///<summary>        /// 邮件的发送        ///</summary>        public void Send()        {            try            {                if (mMailMessage != null)                {                    mSmtpClient = new SmtpClient();                    //mSmtpClient.Host = "smtp." + mMailMessage.From.Host;                    mSmtpClient.Host = this.mSenderServerHost;                    mSmtpClient.Port = this.mSenderPort;                    mSmtpClient.UseDefaultCredentials = false;                    mSmtpClient.EnableSsl = this.mEnableSsl;                    if (this.mEnablePwdAuthentication)                    {                        System.Net.NetworkCredential nc = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);                        //mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);                        //NTLM: Secure Password Authentication in Microsoft Outlook Express                        mSmtpClient.Credentials = nc.GetCredential(mSmtpClient.Host, mSmtpClient.Port, "NTLM");                    }                    else                    {                        mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);                    }                    mSmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;                    mSmtpClient.Send(mMailMessage);                }            }            catch (Exception ex)            {                Console.WriteLine(ex.ToString());            }        }    }}