///
/// SMTP回应代码哈希表
///
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
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
RightCodeHT.Add("354","开始邮件输入，以
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");
}
///
/// 将字符串编码为Base64字符串
///
/// 要编码的字符串
private string Base64Encode(string str)
{
byte[] barray;
barray=Encoding.Default.GetBytes(str);
return Convert.ToBase64String(barray);
}
///
/// 将Base64字符串解码为普通字符串
///
/// 要解码的字符串
private string Base64Decode(string str)
{
byte[] barray;
barray=Convert.FromBase64String(str);
return Encoding.Default.GetString(barray);
}
///
/// 得到上传附件的文件流
///
/// 附件的绝对路径
private string GetStream(string FilePath)
{
//建立文件流对象
System.IO.FileStream FileStr=new System.IO.FileStream(FilePath,System.IO.FileMode.Open);
byte[] by=new byte[System.Convert.ToInt32(FileStr.Length)];
FileStr.Read(by,0,by.Length);
FileStr.Close();
return(System.Convert.ToBase64String(by));
}
///
/// 发送SMTP命令
///
private bool SendCommand(string str)
{
byte[] WriteBuffer;
if(str==null||str.Trim()=="")
{
return true;
}
logs+=str;
logs+=(enter+enter);
htmllog+="";
htmllog+=str;
htmllog+="";
WriteBuffer = Encoding.Default.GetBytes(str);
try
{
ns.Write(WriteBuffer,0,WriteBuffer.Length);
}
catch
{
errmsg="网络连接错误";
return false;
}
return true;
}
///
/// 接收SMTP服务器回应
///
private string RecvResponse()
{
int StreamSize;
string ReturnValue = "";
byte[] ReadBuffer = new byte[1024] ;
try
{
StreamSize=ns.Read(ReadBuffer,0,ReadBuffer.Length);
}
catch
{
errmsg="网络连接错误";
return "false";
}
if (StreamSize==0)
{
return ReturnValue ;
}
else
{
ReturnValue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize);
logs+=ReturnValue + enter + enter;
htmllog+="";
htmllog+=ReturnValue;
htmllog+="";
return ReturnValue;
}
}
///
/// 与服务器交互，发送一条命令并接收回应。
///
/// 一个要发送的命令
/// 如果错误，要反馈的信息
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;
}
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;
}
}
else
{
return false;
}
}
///
/// 与服务器交互，发送一组命令并接收回应。
///
private bool Dialog(string[] str,string errstr)
{
for(int i=0;i { if(!Dialog(str[i],"")) { errmsg+=enter; errmsg+=errstr; return false; } } return true; } //发送邮件 private bool SendEmail() { //连接网络 try { tc=new TcpClient(mailserver,mailserverport); } catch(Exception e) { errmsg=e.ToString(); 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。")) 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")) return false; // SendBuffer=new string[recipientmaxnum]; for(int i=0;i { SendBuffer[i]="RCPT TO:<" + Recipient[i].ToString() +">" + enter; } if(!Dialog(SendBuffer,"收件人地址有误")) return false; SendBufferstr="DATA" + enter; if(!Dialog(SendBufferstr,"")) return false; SendBufferstr="From:" + FromName + "<" + From +">" +enter; SendBufferstr += "To:=?"+Charset.ToUpper()+"?B?"+Base64Encode(RecipientName)+"?="+"<"+Recipient[0]+">"+enter; SendBufferstr+="CC:"; for(int i=0;i { SendBufferstr+=Recipient[i].ToString() + "<" + Recipient[i].ToString() +">,"; } SendBufferstr+=enter; if(Charset=="") { SendBufferstr+="Subject:" + Subject + enter; } else { SendBufferstr+="Subject:" + "=?" + Charset.ToUpper() + "?B?" + Base64Encode(Subject) +"?=" +enter; } SendBufferstr+="X-Priority:" + priority + enter; SendBufferstr+="X-MSMail-Priority:" + priority + enter; SendBufferstr+="Importance:" + priority + enter; SendBufferstr+="X-Mailer: Huolx.Pubclass" + enter; SendBufferstr+="MIME-Version: 1.0" + enter; SendBufferstr += "Content-Type: multipart/mixed;"+enter;//内容格式和分隔符 SendBufferstr += " boundary=\"----=_NextPart_000_00D6_01C29593.AAB31770\""+enter; SendBufferstr += "------=_NextPart_000_00D6_01C29593.AAB31770"+enter; if(Html) { SendBufferstr+="Content-Type: text/html;" + enter; } else { SendBufferstr+="Content-Type: text/plain;" + enter; } if(Charset=="") { SendBufferstr+=" charset=\"iso-8859-1\"" + enter; } else { SendBufferstr+=" charset=\"" + Charset.ToLower() + "\"" + enter; } //SendBufferstr += "Content-Transfer-Encoding: base64"+enter; SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter; SendBufferstr+= Base64Encode(Body) + enter; if(Attachments.Count!=0) { foreach(string filepath in Attachments) { SendBufferstr += "------=_NextPart_000_00D6_01C29593.AAB31770"+enter; 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 += "------=_NextPart_000_00D6_01C29593.AAB31770--"+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; } } }