chmail.dll是我们采用VC++ Unicode开发一款标准调用的DLL组件，用来弥补一些软件邮件发送问题，如MT4或MT5中SendMail函数无法随意修改端口或者发送一些其它邮件的缺点。可免费下载测试，dll正式版是 500 元 永久使用。带VC++源码是 3000 元。有需要的朋友可联系在线客服。

压缩包目录结构：
MQL4/
MQL4/Libraries/
MQL4/Libraries/chmail.dll
MQL4/Libraries/libgsasl-7.dll
MQL4/Scripts/
MQL4/Scripts/chmailTest.mq4
策汇在线.url
必须读我.txt

MQL4/Scripts/chmailTest.mq4代码片段：
//+------------------------------------------------------------------+
//|                                                   chmailTest.mq4 |
//|                        Copyright 2020, MetaQuotes Software Corp. |
//|                                             http://www.fxchs.com |
//+------------------------------------------------------------------+
#property copyright "策汇在线 邮件组件chmail.dll 测试脚本"
#property link      "http://www.fxchs.com"
#property version   "1.00"
#property strict



#import "chmail.dll"
   int chSendMailBySMTP(string Server,          // 邮箱服务器SMTP地址
                        int Port,               // 邮箱服务器端口
                        string User,            // 登录邮箱用户名
                        string Password,        // 登录邮箱密码
                        string From,            // 发件人
                        string To,              // 收件人
                        string Subject,         // 主题
                        string Text,            // 内容
                        string Attachment,      // 附件
                        bool UseHtml,           // 是否使用HTML格式
                        string &Error);         // 返回错误，当函数为非0时，返回错误文本
#import




//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
{
   int nRet = 0;
   
   string strError = "";
   string strText = "策汇在线邮件发送扩展DLL测试。。。。";
   string strTextSubject = "chmail.dll邮件普通文本发送测试";
   string strHTML = "<div style=\"font-size:28px;color:#bb0000;\"><a href=\"www.fxchs.com\" target=\"_blank\">策汇在线</a>邮件发送扩展DLL测试</div><br/><br/><img src=\"data:image/png;base64,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\"/>";
   string strHTMLSubject = "chmail.dll邮件HTML发送测试";
   
   
   string strServer = "smtp.qq.com";           // 邮箱服务器
   int    nPort = 465;                         // 邮箱端口
   string strFrom = "xxxxxxxxx@qq.com";       // 发件人
   string strTo = "xxxxxxxxx@qq.com";         // 收件人
   string strUser = "xxxxxxxxxx@qq.com";       // 邮箱用户名
   string strPassword = "xxxxxxx";    	       // 邮箱密码
   

   // 多申请点内存空间
   StringInit(strError,2024,0);       
   
   // 发送普通文本 
   Print("正在测试普通文本邮件发送...");
   nRet = chSendMailBySMTP(strServer,nPort,strUser,strPassword,strFrom,strTo,strTextSubject,strText,"",false,strError);
   if (nRet != 0)
   {
      Print("普通文本邮件发送失败！错误：",strError);
   }
   else
   {
      Print("发送普通邮件成功！");
   }
      
   // 发送HTML
   Print("正在测试HTML邮件发送...");
   nRet = chSendMailBySMTP(strServer,nPort,strUser,strPassword,strFrom,strTo,strHTMLSubject,strHTML,"",true,strError);
   if (nRet != 0)
   {
      Print("HTML邮件发送失败！错误：",strError);
   }
   else
   {
      Print("发送HTML邮件成功！");
   }  
   
   // 发送附件前，先写个文本
   string terminal_data_path=TerminalInfoString(TERMINAL_DATA_PATH); 
   string filename=terminal_data_path+"\\MQL4\\Files\\chmailTest.txt";
   int nHandle = FileOpen("chmailTest.txt",FILE_WRITE|FILE_CSV); 
   if(nHandle!=INVALID_HANDLE) 
   { 
      FileWriteString(nHandle,strText,StringLen(strText)); 
      FileClose(nHandle); 
   }
   Print("正在测试带附件邮件发送...");
   nRet = chSendMailBySMTP(strServer,nPort,strUser,strPassword,strFrom,strTo,strTextSubject,strText,filename,false,strError);
   if (nRet != 0)
   {
      Print("带附件邮件发送失败！错误：",strError);
   }
   else
   {
      Print("带附件邮件发送成功！");
   }

}
//+------------------------------------------------------------------+