The following c++ example codes demonstrate how to retrieve email over TLS connection from POP3 server. This sample downloads emails from POP3 server and deletes the email after the email is retrieved.
SSL and TLS
SSL connection encrypts data between the email component and POP3 server or IMAP4 server to protect user, password and email content in TCP/IP level. Now this technology is commonly used and many email servers are deployed with SSL such as Gmail, Yahoo and Hotmail.
There are two ways to deploy SSL on email server:
Implicit SSL
Deploying SSL on another port (POP3: 995 port or IMAP4: 993 port) directly. This is most common way.
Explicit SSL (TLS)
Using STARTTLS or STLS command to switch SSL channel on normal port (POP3: 110 port or IMAP4: 143 port);
STLS command can switch normal POP3 connection to SSL connection.
Sections:
Before you can use the following sample codes, you should download the EAGetMail Installer and install it on your machine at first. Full sample projects are included in this installer.
To use EAGetMail POP3 & IMAP4 ActiveX Object in your project, the first step is “Add header files of EAGetMail to your project”.
Please go to C:\Program Files\EAGetMail\Samples_VS2008\pop3_imap4_simple.vcNative
or C:\Program Files (x86)\EAGetMail\Samples_VS2008\pop3_imap4_simple.vcNative
folder, find eagetmailobj.tlh
and eagetmailobj.tli
,
and then copy these files to your project folder. You can start to use it to retrieve email and parse email in your project.
The following example codes demonstrate retrieving email over TLS from POP3 server.
In order to run it correctly, please change email server
, user
, password
, folder
, file name
value to yours.
Note
To get full sample projects, please download and install EAGetMail on your machine.
#include "stdafx.h"
#include "eagetmailobj.tlh"
using namespace EAGetMailObjLib;
int _tmain(int argc, _TCHAR* argv[])
{
const int MailServerPop3 = 0;
const int MailServerImap4 = 1;
const int ConnectSSLAuto = 0;
const int ConnectSSL = 1;
const int ConnectTLS = 2;
// Initialize COM environment
::CoInitialize(NULL);
// Create a folder named "inbox" under current exe file directory
// to save the emails retrieved.
TCHAR szPath[MAX_PATH+1];
memset(szPath, 0, sizeof(szPath));
::GetModuleFileName(NULL, szPath, MAX_PATH);
// Change file name to current full path
LPCTSTR psz = _tcsrchr(szPath, _T('\\'));
if(psz != NULL)
{
szPath[psz-szPath] = _T('\0');
}
TCHAR szMailBox[MAX_PATH+1];
memset(szMailBox, 0, sizeof(szMailBox));
wsprintf(szMailBox, _T("%s\\inbox"), szPath);
// Create a folder to store emails
::CreateDirectory(szMailBox, NULL);
try
{
IMailServerPtr oServer = NULL;
oServer.CreateInstance("EAGetMailObj.MailServer");
oServer->Server = _T("pop3.emailarchitect.net");
oServer->User = _T("test@emailarchitect.net");
oServer->Password = _T("testpassword");
oServer->Protocol = MailServerPop3;
// Enable SSL Connection
oServer->SSLConnection = VARIANT_TRUE;
// Set 110 POP3 Port
oServer->Port = 110;
// Set TLS connection type
oServer->SSLType = ConnectTLS;
IMailClientPtr oClient = NULL;
oClient.CreateInstance("EAGetMailObj.MailClient");
oClient->LicenseCode = _T("TryIt");
oClient->Connect(oServer);
_tprintf(_T("Connected\r\n"));
_variant_t infos = oClient->GetMailInfos();
SAFEARRAY *psa = infos.parray;
long LBound = 0, UBound = 0;
SafeArrayGetLBound(psa, 1, &LBound);
SafeArrayGetUBound(psa, 1, &UBound);
INT count = UBound-LBound+1;
_tprintf(_T("Total %d emails\r\n"), count);
for(long i = LBound; i <= UBound; i++)
{
_variant_t vtInfo;
SafeArrayGetElement(psa, &i, &vtInfo);
IMailInfoPtr pInfo;
vtInfo.pdispVal->QueryInterface(__uuidof(IMailInfo), (void**)&pInfo);
TCHAR szFile[MAX_PATH+1];
memset(szFile, 0, sizeof(szFile));
// Generate a random file name by current local datetime,
// You can use your method to generate the filename if you do not like it
SYSTEMTIME curtm;
::GetLocalTime(&curtm);
::wsprintf(szFile, _T("%s\\%04d%02d%02d%02d%02d%02d%03d%d.eml"),
szMailBox,
curtm.wYear,
curtm.wMonth,
curtm.wDay,
curtm.wHour,
curtm.wMinute,
curtm.wSecond,
curtm.wMilliseconds,
i);
// Receive email from POP3 server
IMailPtr oMail = oClient->GetMail(pInfo);
// Save email to local disk
oMail->SaveAs(szFile, VARIANT_TRUE);
// Mark email as deleted from POP3 server.
oClient->Delete(pInfo);
}
// Delete method just mark the email as deleted,
// Quit method purge the emails from server exactly.
infos.Clear();
oClient->Quit();
}
catch(_com_error &ep)
{
_tprintf(_T("Error: %s"), (const TCHAR*)ep.Description());
}
return 0;
}
Seperate builds of run-time dll for 32 and x64 platform
File | Platform |
Installation Path\EAGetMailObj.dll | 32 bit |
Installation Path\x64\EAGetMailObj.dll | 64 bit |
Standard EXE
For VB6, C++, Delphi or other standard exe application, you can distribute EAGetMailObj.dll with your application to target machine without COM-registration and installer. To learn more detail, please have a look at Registration-free COM with Manifest File.
Script
For ASP, VBScript, VBA, MS SQL Stored Procedure, you need to install EAGetMail on target machine by EAGetMail installer, both 32bit/x64 DLL are installed and registered.
Appendix
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