//============================================================// File: MailSender.cs// 邮件发送组件// 支持ESMTP, 多附件//============================================================namespace JcPersonal.Utility...{ using System; using System.Collections; using System.Net.Sockets; using System.IO; using System.Text; /**//// <summary> /// Mail 发送器 /// </summary> public class MailSender ...{ /**//// <summary> /// SMTP服务器域名 /// </summary> public string Server ...{ get ...{ return server; } set ...{ if (value != server) server = value; } } private string server = ""; /**//// <summary> /// SMTP服务器端口 [默认为25] /// </summary> public int Port ...{ get ...{ return port; } set ...{ if (value != port) port = value; } } private int port = 25; /**//// <summary> /// 用户名 [如果需要身份验证的话] /// </summary> public string UserName ...{ get ...{ return userName; } set ...{ if (value != userName) userName = value; } } private string userName = ""; /**//// <summary> /// 密码 [如果需要身份验证的话] /// </summary> public string Password ...{ get ...{ return password; } set ...{ if (value != password) password = value; } } private string password = ""; /**//// <summary> /// 发件人地址 /// </summary> public string From ...{ get ...{ return from; } set ...{ if (value != from) from = value;} } private string from = ""; /**//// <summary> /// 收件人地址 /// </summary> public string To ...{ get ...{ return to; } set ...{ if (value != to) to = value;} } private string to = ""; /**//// <summary> /// 发件人姓名 /// </summary> public string FromName ...{ get ...{ return fromName; } set ...{ if (value != fromName) fromName = value; } } private string fromName = ""; /**//// <summary> /// 收件人姓名 /// </summary> public string ToName ...{ get ...{ return toName; } set ...{ if (value != toName) toName = value; } } private string toName = ""; /**//// <summary> /// 邮件的主题 /// </summary> public string Subject ...{ get ...{ return subject; } set ...{ if (value != subject) subject = value; } } private string subject = ""; /**//// <summary> /// 邮件正文 /// </summary> public string Body ...{ get ...{ return body; } set ...{ if (value != body) body = value; } } private string body = ""; /**//// <summary> /// 超文本格式的邮件正文 /// </summary> public string HtmlBody ...{ get ...{ return htmlBody; } set ...{ if (value != htmlBody) htmlBody = value; } } private string htmlBody = ""; /**//// <summary> /// 是否是html格式的邮件 /// </summary> public bool IsHtml ...{ get ...{ return isHtml; } set ...{ if (value != isHtml) isHtml = value; } } private bool isHtml = false; /**//// <summary> /// 语言编码 [默认为GB2312] /// </summary> public string LanguageEncoding ...{ get ...{ return languageEncoding; } set ...{ if (value != languageEncoding) languageEncoding = value; } } private string languageEncoding = "GB2312"; /**//// <summary> /// 邮件编码 [默认为8bit] /// </summary> public string MailEncoding ...{ get ...{ return encoding; } set ...{ if (value != encoding) encoding = value; } } private string encoding = "8bit"; /**//// <summary> /// 邮件优先级 [默认为3] /// </summary> public int Priority ...{ get ...{ return priority; } set ...{ if (value != priority) priority = value; } } private int priority = 3; /**//// <summary> /// 附件 [AttachmentInfo] /// </summary> public IList Attachments ...{ get ...{ return attachments; }// set { if (value != attachments) attachments = value; } } private ArrayList attachments = new ArrayList (); /**//// <summary> /// 发送邮件 /// </summary> public void SendMail () ...{ // 创建TcpClient对象, 并建立连接 TcpClient tcp = null; try ...{ tcp = new TcpClient (server, port); } catch (Exception) ...{ throw new Exception ("无法连接服务器"); } ReadString (tcp.GetStream());//获取连接信息 // 开始进行服务器认证 // 如果状态码是250则表示操作成功 if (!Command (tcp.GetStream(), "EHLO Localhost", "250")) throw new Exception ("登陆阶段失败"); if (userName != "") ...{ // 需要身份验证 if (!Command (tcp.GetStream(), "AUTH LOGIN", "334")) throw new Exception ("身份验证阶段失败"); string nameB64 = ToBase64 (userName); // 此处将username转换为Base64码 if (!Command (tcp.GetStream(), nameB64, "334")) throw new Exception ("身份验证阶段失败"); string passB64 = ToBase64 (password); // 此处将password转换为Base64码 if (!Command (tcp.GetStream(), passB64, "235")) throw new Exception ("身份验证阶段失败"); } // 准备发送 WriteString (tcp.GetStream(), "mail From: " + from); WriteString (tcp.GetStream(), "rcpt to: " + to); WriteString (tcp.GetStream(), "data"); // 发送邮件头 WriteString (tcp.GetStream(), "Date: " + DateTime.Now); // 时间 WriteString (tcp.GetStream(), "From: " + fromName + "<" + from + ">"); // 发件人 WriteString (tcp.GetStream(), "Subject: " + subject); // 主题 WriteString (tcp.GetStream(), "To:" + toName + "<" + to + ">"); // 收件人 //邮件格式 WriteString (tcp.GetStream(), "Content-Type: multipart/mixed; boundary=/"unique-boundary-1/""); WriteString (tcp.GetStream(), "Reply-To:" + from); // 回复地址 WriteString (tcp.GetStream(), "X-Priority:" + priority); // 优先级 WriteString (tcp.GetStream(), "MIME-Version:1.0"); // MIME版本 // 数据ID,随意// WriteString (tcp.GetStream(), "Message-Id: " + DateTime.Now.ToFileTime() + "@security.com"); WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding); // 内容编码 WriteString (tcp.GetStream(), "X-Mailer:JcPersonal.Utility.MailSender"); // 邮件发送者 WriteString (tcp.GetStream(), ""); WriteString (tcp.GetStream(), ToBase64 ("This is a multi-part message in MIME format.")); WriteString (tcp.GetStream(), ""); // 从此处开始进行分隔输入 WriteString (tcp.GetStream(), "--unique-boundary-1"); // 在此处定义第二个分隔符 WriteString (tcp.GetStream(), "Content-Type: multipart/alternative;Boundary=/"unique-boundary-2/""); WriteString (tcp.GetStream(), ""); if(!isHtml) ...{ // 文本信息 WriteString (tcp.GetStream(), "--unique-boundary-2"); WriteString (tcp.GetStream(), "Content-Type: text/plain;charset=" + languageEncoding); WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding); WriteString (tcp.GetStream(), ""); WriteString (tcp.GetStream(), body); WriteString (tcp.GetStream(), "");//一个部分写完之后就写如空信息,分段 WriteString (tcp.GetStream(), "--unique-boundary-2--");//分隔符的结束符号,尾巴后面多了-- WriteString (tcp.GetStream(), ""); } else ...{ //html信息 WriteString (tcp.GetStream(), "--unique-boundary-2"); WriteString (tcp.GetStream(), "Content-Type: text/html;charset=" + languageEncoding); WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding); WriteString (tcp.GetStream(), ""); WriteString (tcp.GetStream(), htmlBody); WriteString (tcp.GetStream(), ""); WriteString (tcp.GetStream(), "--unique-boundary-2--");//分隔符的结束符号,尾巴后面多了-- WriteString (tcp.GetStream(), ""); } // 发送附件 // 对文件列表做循环 for (int i = 0; i < attachments.Count; i++) ...{ WriteString (tcp.GetStream(), "--unique-boundary-1"); // 邮件内容分隔符 WriteString (tcp.GetStream(), "Content-Type: application/octet-stream;name=/"" + ((AttachmentInfo)attachments[i]).FileName + "/""); // 文件格式 WriteString (tcp.GetStream(), "Content-Transfer-Encoding: base64"); // 内容的编码 WriteString (tcp.GetStream(), "Content-Disposition:attachment;filename=/"" + ((AttachmentInfo)attachments[i]).FileName + "/""); // 文件名 WriteString (tcp.GetStream(), ""); WriteString (tcp.GetStream(), ((AttachmentInfo)attachments[i]).Bytes); // 写入文件的内容 WriteString (tcp.GetStream(), ""); } Command (tcp.GetStream(), ".", "250"); // 最后写完了,输入"." // 关闭连接 tcp.Close (); } /**//// <summary> /// 向流中写入字符 /// </summary> /// <param name="netStream">来自TcpClient的流</param> /// <param name="str">写入的字符</param> protected void WriteString (NetworkStream netStream, string str) ...{ str = str + "/r/n"; // 加入换行符 // 将命令行转化为byte[] byte[] bWrite = Encoding.GetEncoding(languageEncoding).GetBytes(str.ToCharArray()); // 由于每次写入的数据大小是有限制的,那么我们将每次写入的数据长度定在75个字节,一旦命令长度超过了75,就分步写入。 int start=0; int length=bWrite.Length; int page=0; int size=75; int count=size; try ...{ if (length>75) ...{ // 数据分页 if ((length/size)*size<length) page=length/size+1; else page=length/size; for (int i=0;i<page;i++) ...{ start=i*size; if (i==page-1) count=length-(i*size); netStream.Write(bWrite,start,count);// 将数据写入到服务器上 } } else netStream.Write(bWrite,0,bWrite.Length); } catch(Exception) ...{ // 忽略错误 } } /**//// <summary> /// 从流中读取字符 /// </summary> /// <param name="netStream">来自TcpClient的流</param> /// <returns>读取的字符</returns> protected string ReadString (NetworkStream netStream) ...{ string sp = null; byte[] by = new byte[1024]; int size = netStream.Read(by,0,by.Length);// 读取数据流 if (size > 0) ...{ sp = Encoding.Default.GetString(by);// 转化为String } return sp; } /**//// <summary> /// 发出命令并判断返回信息是否正确 /// </summary> /// <param name="netStream">来自TcpClient的流</param> /// <param name="command">命令</param> /// <param name="state">正确的状态码</param> /// <returns>是否正确</returns> protected bool Command (NetworkStream netStream, string command, string state) ...{ string sp=null; bool success=false; try ...{ WriteString (netStream, command);// 写入命令 sp = ReadString (netStream);// 接受返回信息 if (sp.IndexOf(state) != -1)// 判断状态码是否正确 success=true; } catch(Exception) ...{ // 忽略错误 } return success; } /**//// <summary> /// 字符串编码为Base64 /// </summary> /// <param name="str">字符串</param> /// <returns>Base64编码的字符串</returns> protected string ToBase64 (string str) ...{ try ...{ byte[] by = Encoding.Default.GetBytes (str.ToCharArray()); str = Convert.ToBase64String (by); } catch(Exception) ...{ // 忽略错误 } return str; } /**//// <summary> /// 附件信息 /// </summary> public struct AttachmentInfo ...{ /**//// <summary> /// 附件的文件名 [如果输入路径,则自动转换为文件名] /// </summary> public string FileName ...{ get ...{ return fileName; } set ...{ fileName = Path.GetFileName(value); } } private string fileName; /**//// <summary> /// 附件的内容 [由经Base64编码的字节组成] /// </summary> public string Bytes ...{ get ...{ return bytes; } set ...{ if (value != bytes) bytes = value; } } private string bytes; /**//// <summary> /// 从流中读取附件内容并构造 /// </summary> /// <param name="ifileName">附件的文件名</param> /// <param name="stream">流</param> public AttachmentInfo (string ifileName, Stream stream) ...{ fileName = Path.GetFileName (ifileName); byte[] by = new byte [stream.Length]; stream.Read (by,0,(int)stream.Length); // 读取文件内容 //格式转换 bytes = Convert.ToBase64String (by); // 转化为base64编码 } /**//// <summary> /// 按照给定的字节构造附件 /// </summary> /// <param name="ifileName">附件的文件名</param> /// <param name="ibytes">附件的内容 [字节]</param> public AttachmentInfo (string ifileName, byte[] ibytes) ...{ fileName = Path.GetFileName (ifileName); bytes = Convert.ToBase64String (ibytes); // 转化为base64编码 } /**//// <summary> /// 从文件载入并构造 /// </summary> /// <param name="path"></param> public AttachmentInfo (string path) ...{ fileName = Path.GetFileName (path); FileStream file = new FileStream (path, FileMode.Open); byte[] by = new byte [file.Length]; file.Read (by,0,(int)file.Length); // 读取文件内容 //格式转换 bytes = Convert.ToBase64String (by); // 转化为base64编码 file.Close (); } } }}--------------------------------------------------------------------------------// 使用: MailSender ms = new MailSender (); ms.From = "jovenc@tom.com"; ms.To = "jovenc@citiz.net"; ms.Subject = "Subject"; ms.Body = "body text"; ms.UserName = "########"; // 怎么能告诉你呢 ms.Password = "********"; // 怎么能告诉你呢 ms.Server = "smtp.tom.com"; ms.Attachments.Add (new MailSender.AttachmentInfo (@"D:/test.txt")); Console.WriteLine ("mail sending..."); try ...{ ms.SendMail (); Console.WriteLine ("mail sended."); } catch (Exception e) ...{ Console.WriteLine (e); }