📄 sendmail.cs
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}
return SendEmail();
}
/// <summary>
/// 发送邮件方法
/// </summary>
/// <param name="smtpserver">smtp服务器信息，如"username:password@www.smtpserver.com:25"，也可去掉部分次要信
public bool Send(string smtpserver)
{
MailDomain=smtpserver;
return Send();
}
/// <summary>
/// 发送邮件方法
/// </summary>
/// <param name="smtpserver">smtp服务器信息，如"username:password@www.smtpserver.com:25"，也可去掉部分次要信
/// <param name="from">发件人mail地址</param>
/// <param name="fromname">发件人姓名</param>
/// <param name="to">收件人地址</param>
/// <param name="toname">收件人姓名</param>
/// <param name="html">是否HTML邮件</param>
/// <param name="subject">邮件主题</param>
/// <param name="body">邮件正文</param>
public bool Send(string smtpserver,string from,string fromname,string to,bool html,string
subject,string body)
{
MailDomain=smtpserver;
From=from;
FromName=fromname;
Recipient=to;
Html=html;
Subject=subject;
Body=body;
return Send();
}
void Dispose()
{
if(ns!=null)ns.Close();
if(tc!=null)tc.Close();
}
/// <summary>
/// SMTP回应代码哈希表
/// </summary>
private void SMTPCodeAdd()
{
ErrCodeHT.Add("500","邮箱地址错误");
ErrCodeHT.Add("501","参数格式错误");
ErrCodeHT.Add("502","命令不可实现");
ErrCodeHT.Add("503","服务器需要SMTP验证");
ErrCodeHT.Add("504","命令参数不可实现");
ErrCodeHT.Add("421","服务未就绪，关闭传输信道");
ErrCodeHT.Add("450","要求的邮件操作未完成，邮箱不可用（例如，邮箱忙）");
ErrCodeHT.Add("550","要求的邮件操作未完成，邮箱不可用（例如，邮箱未找到，或不可访问）");
ErrCodeHT.Add("451","放弃要求的操作；处理过程中出错");
ErrCodeHT.Add("551","用户非本地，请尝试<forward-path>");
ErrCodeHT.Add("452","系统存储不足，要求的操作未执行");
ErrCodeHT.Add("552","过量的存储分配，要求的操作未执行");
ErrCodeHT.Add("553","邮箱名不可用，要求的操作未执行（例如邮箱格式错误）");
ErrCodeHT.Add("432","需要一个密码转换");
ErrCodeHT.Add("534","认证机制过于简单");
ErrCodeHT.Add("538","当前请求的认证机制需要加密");
ErrCodeHT.Add("454","临时认证失败");
ErrCodeHT.Add("530","需要认证");
RightCodeHT.Add("220","服务就绪");
RightCodeHT.Add("250","要求的邮件操作完成");
RightCodeHT.Add("251","用户非本地，将转发向<forward-path>");
RightCodeHT.Add("354","开始邮件输入，以<enter>.<enter>结束");
RightCodeHT.Add("221","服务关闭传输信道");
RightCodeHT.Add("334","服务器响应验证Base64字符串");
RightCodeHT.Add("235","验证成功");
}
/// <summary>
/// 将字符串编码为Base64字符串
/// </summary>
/// <param name="str">要编码的字符串</param>
private string Base64Encode(string str)
{
byte[] barray;
barray=Encoding.Default.GetBytes(str);
return Convert.ToBase64String(barray);
}
/// <summary>
/// 将Base64字符串解码为普通字符串
/// </summary>
/// <param name="str">要解码的字符串</param>
private string Base64Decode(string str)
{
byte[] barray;
barray=Convert.FromBase64String(str);
return Encoding.Default.GetString(barray);
}
/// <summary>
/// 发送SMTP命令
/// </summary>
private bool SendCommand(string str)
{
byte[] WriteBuffer;
if(str==null||str.Trim()==String.Empty)
{
return true;
}
WriteBuffer = Encoding.Default.GetBytes(str);
try
{
ns.Write(WriteBuffer,0,WriteBuffer.Length);
}
catch
{
errmsg="网络连接错误";
return false;
}
return true;
}
/// <summary>
/// 接收SMTP服务器回应
/// </summary>
private string RecvResponse()
{
int StreamSize;
string ReturnValue = String.Empty;
byte[] ReadBuffer = new byte[1024] ;
try
{
StreamSize=ns.Read(ReadBuffer,0,ReadBuffer.Length);
}
catch(Exception ex)
{
MessageBox.Show (ex.ToString ());
return "false";
}
if (StreamSize==0)
{
return ReturnValue ;
}
else
{
ReturnValue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize);
return ReturnValue;
}
}
/// <summary>
/// 与服务器交互，发送一条命令并接收回应。
/// </summary>
/// <param name="str">一个要发送的命令</param>
/// <param name="errstr">如果错误，要反馈的信息</param>
private bool Dialog(string str,string errstr)
{
if(str==null||str.Trim()=="")
{
return true;
}
if(SendCommand(str))
{
string RR=RecvResponse();
if(RR=="false")
{
return false;
}
try
{
string RRCode=RR.Substring(0,3);
if(RightCodeHT[RRCode]!=null)
{
return true;
}
else
{
if(ErrCodeHT[RRCode]!=null)
{
errmsg+=(RRCode+ErrCodeHT[RRCode].ToString());
errmsg+=enter;
}
else
{
errmsg+=RR;
}
errmsg+=errstr;
return false;
}
}
catch
{
MessageBox.Show ("发送的附件超过本服务器对个人软件的支持！","请检查附件的大小");
return false;
}
}
else
{
return false;
}
}
/// <summary>
/// 与服务器交互，发送一组命令并接收回应。
/// </summary>
private bool Dialog(string[] str,string errstr)
{
for(int i=0;i<str.Length;i++)
{
//如果在身份验证阶段有一个不成功，就返回错误标志位
if(!Dialog(str[i],""))
{
errmsg+=enter;
errmsg+=errstr;
return false;
}
}
//身份验证全部正确的话，则返回正确标志位
return true;
}
/// <summary>
/// SendEmail
/// </summary>
/// <returns></returns>
private bool SendEmail()
{
try
{
tc=new TcpClient(mailserver,mailserverport);
}
catch
{
MessageBox.Show ("连接失败","请确认");
return false;
}
ns = tc.GetStream();
SMTPCodeAdd();
//验证网络连接是否正确
if(RightCodeHT[RecvResponse().Substring(0,3)]==null)
{
errmsg="网络连接失败";
return false;
}
string[] SendBuffer;
string SendBufferstr;
//进行SMTP验证
if(ESmtp)
{
SendBuffer=new String[4];
SendBuffer[0]="EHLO " + mailserver + enter;
SendBuffer[1]="AUTH LOGIN" + enter;
SendBuffer[2]=Base64Encode(username) + enter;
SendBuffer[3]=Base64Encode(password) + enter;
if(!Dialog(SendBuffer,"SMTP服务器验证失败，请核对用户名和密码。"))
{
MessageBox.Show ("SMTP服务器验证失败，请核对用户名和密码。");
return false;
}
}
else
{
SendBufferstr="HELO " + mailserver + enter;
if(!Dialog(SendBufferstr,""))
return false;
}
//
SendBufferstr="MAIL FROM:<" + From + ">" + enter;
if(!Dialog(SendBufferstr,"发件人地址错误，或不能为空"))
{
MessageBox.Show("发件人地址错误，或不能为空");
return false;
}
//把传过来的收件人的地址分割然后提交给服务器
string split=",";
string []address=Regex.Split (RecipientName,split);
SendBuffer=new string [address.Length];
for(int i=0;i<SendBuffer.Length;i++)
{
SendBuffer[i]="RCPT TO:<" +address[i]+">" + enter;
}
if(!Dialog(SendBuffer,"收件人地址有误"))
{
MessageBox.Show("收件人地址有误");
return false;
}
SendBufferstr="DATA" + enter;
if(!Dialog(SendBufferstr,""))
return false;
SendBufferstr="From:" + FromName + "<" + From +">" +enter;
SendBufferstr += "To:<"+RecipientName+">"+enter;
SendBufferstr+=((Subject==String.Empty || Subject==null)?"Subject:":((Charset=="")?("Subject:" +
Subject):("Subject:" + "=?" + Charset.ToUpper() + "?B?" + Base64Encode(Subject) +"?="))) + enter;
SendBufferstr+="X-Priority:" + priority + enter;
SendBufferstr+="X-Mailer: ArgentSwan Mail Sender" + enter;
SendBufferstr+="MIME-Version: 1.0" + enter;
//MIME定义了5个新的信头字段，可以与原有信头字段一样，用在RF822邮件的首部中。
//1．MIME版本信头字段 格式：MIME-Version:1.0 <CRLF>
//2．邮件唯一标识信头字段 格式：Content-ID：唯一标识信件的字符串 <CRLF>
//3．邮件内容描述信头字段 格式：Content-Description:描述文本 <CRLF>
//4．MIME邮件的内容类型信头字段 格式：Content-Type:主类别标识符/子类别标识符 [；参数列表] <CRLF>
//5．内容传送编码方式信头字段 格式：Content-Transfer-Encoding:编码方式标识符 <CRLF>
if(Attachments.Count!=0)
{
//mixed 按照特定顺序的几个独立部分
SendBufferstr+="Content-Type: multipart/mixed;" + enter;
SendBufferstr += " boundary=\"***"+
(Html?"001_yinhu19821115":"001_yinhu19831115")+"***\""+enter+enter;
}
if(Html)
{
if(Attachments.Count==0)
{
//multipart多部分 alternative 不同格式的同一邮件
SendBufferstr += "Content-Type: multipart/alternative;"+enter;//内容格式和分隔符
SendBufferstr += " boundary=\"***003_yinhu19821115***\""+enter+enter;
SendBufferstr += "This is a multi-part message in MIME format."+enter+enter;
}
else
{
SendBufferstr +="This is a multi-part message in MIME format."+enter+enter;
SendBufferstr += "--***001_yinhu19821115***"+enter;
SendBufferstr += "Content-Type: multipart/alternative;"+enter;//内容格式和分隔符
SendBufferstr += " boundary=\"***003_yinhu19821115***\""+enter+enter;
}
SendBufferstr += "--***003_yinhu19821115***"+enter;
SendBufferstr += "Content-Type: text/plain;"+ enter;
SendBufferstr += ((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" +
Charset.ToLower() + "\"")) + enter;
SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;
SendBufferstr+= Base64Encode("邮件内容为HTML格式，请选择HTML方式查看") + enter + enter;
SendBufferstr += "--***003_yinhu19821115***"+enter;
SendBufferstr+="Content-Type: text/html;" + enter;
SendBufferstr+=((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" +
Charset.ToLower() + "\"")) + enter;
SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;
SendBufferstr+=Base64Encode(Body)+ enter + enter;
SendBufferstr += "--***003_yinhu19821115***--"+enter;
}
else
{
if(Attachments.Count!=0)
{
SendBufferstr += "--***001_yinhu19831115***"+enter;
}
SendBufferstr+="Content-Type: text/plain;" + enter;
SendBufferstr+=((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" +
Charset.ToLower() + "\"")) + enter;
SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;
SendBufferstr+= Base64Encode(Body) + enter;
}
if(Attachments.Count!=0)
{
for(int i=0;i<Attachments.Count;i++)
{
string filepath = Attachments[i].ToString();
SendBufferstr += "--***"+
(Html?"001_yinhu19821115":"001_yinhu19831115") +"***"+enter;
//用于在电子邮件中传输一个含有任意数据的实体。内容是一个未解释的字节序列。
//当内容类型未知或者对数据没有具体定义媒体类别时，通常使用它描述
SendBufferstr += "Content-Type: application/octet-stream"+enter;
SendBufferstr += " name=\"=?"+Charset.ToUpper()+"?B?"+Base64Encode
(filepath.Substring(filepath.LastIndexOf("\\")+1))+"?=\""+enter;
SendBufferstr += "Content-Transfer-Encoding: base64"+enter;
SendBufferstr += "Content-Disposition: attachment;"+enter;
SendBufferstr += " filename=\"=?"+Charset.ToUpper()+"?B?"+Base64Encode
(filepath.Substring(filepath.LastIndexOf("\\")+1))+"?=\""+enter+enter;
SendBufferstr += GetStream(filepath)+enter+enter;
}
SendBufferstr += "--***"+ (Html?"001_yinhu19821115":"001_yinhu19831115")
+"***--"+enter+enter;
}
SendBufferstr += enter + "." + enter;
if(!Dialog(SendBufferstr,"错误信件信息"))
return false;
SendBufferstr="QUIT" + enter;
if(!Dialog(SendBufferstr,"断开连接时错误"))
return false;
ns.Close();
tc.Close();
return true;
}
}
}
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