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#1 Posted : Monday, May 2, 2011 4:58:36 AM(UTC)

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Visual C++ Example

Gmail IMAP4 server address is "imap.gmail.com". It requires SSL connection on 993 port, and you should use your Gmail email address as the user name for user authentication. For example: your email is "gmailid@gmail.com", and then the user name should be "gmailid@gmail.com".

To retrieve email from Gmail account, you need to enable POP3 or IMAP4 access in your gmail account settings.

Because Gmail POP3 server doesn't work like normal POP3 server, it hides old emails automatically even the email was not deleted, so we suggest that you use IMAP4 protocol.

The following example codes demonstrate how to retrieve email from Gmail IMAP4 server.


// The following example codes demonstrate retrieving email from Gmail IMAP4 server
// To get full sample projects, please download and install EAGetMail on your machine.
// To run it correctly, please change email server, user, password, folder, file name value to yours

#include "stdafx.h" 

#include "eagetmailobj.tlh" 
using namespace EAGetMailObjLib; 

int _tmain(int argc, _TCHAR* argv[]) 
    const int MailServerPop3 = 0; 
    const int MailServerImap4 = 1; 

    // 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 ); 

        IMailServerPtr oServer = NULL; 

        // Gmail IMAP4 server address
        oServer->Server = _T("imap.gmail.com"); 
        oServer->User = _T("gmailid@gmail.com"); 
        oServer->Password = _T("testpassword"); 
        oServer->Protocol = MailServerImap4; 

        // Enable SSL connection
        oServer->SSLConnection = VARIANT_TRUE; 

        // Set 993 IMAP4 SSL port
        oServer->Port = 993; 

        IMailClientPtr oClient = NULL; 
        oClient->LicenseCode = _T("TryIt"); 

        oClient->Connect( oServer ); 

        _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"), 
                i ); 

            // Receive email from Gmail IMAP server
            IMailPtr oMail = oClient->GetMail(pInfo); 

            // Save email to local disk
            oMail->SaveAs( szFile, VARIANT_TRUE ); 

            // Mark email as deleted from Gmail IMAP server.
            oClient->Delete( pInfo ); 

        // Delete method just mark the email as deleted,
        // Quit method pure the emails from server exactly.
    catch( _com_error &ep ) 
        _tprintf( _T("Error: %s"), (const TCHAR*)ep.Description()); 

    return 0; 

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