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#1 Posted : Saturday, April 2, 2011 4:16:50 AM(UTC)

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VC++ Example

Validate Email Address Syntax

Regular expression can be used to validate if an email address is in correct format. For example: you can use this "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}$" pattern to verify if the email address has valid format.

Test Email Address

Even the email address has a valid format, it doesn't mean the email address is existed in real world. TestEmailAddr method can be used to test if the email address is valid.

// The following example codes demonstrate testing email address using MX DNS lookup
// To get full sample projects, please download and install EASendMail on your machine.
// To run it correctly, please change SMTP server, user, password, sender, recipient value to yours


#include "stdafx.h" 

#include "easendmailobj.tlh" 
using namespace EASendMailObjLib; 

int _tmain(int argc, _TCHAR* argv[]) 
    ::CoInitialize( NULL ); 

    IMailPtr oSmtp = NULL; 
    oSmtp.CreateInstance( "EASendMailObj.Mail"); 
    oSmtp->LicenseCode = _T("TryIt"); 

    // Set your sender email address
    oSmtp->FromAddr = _T("test@emailarchitect.net"); 

    // Add recipient email address
    oSmtp->AddRecipientEx( _T("support@emailarchitect.net"), 0 ); 

    // Do not set SMTP server address
    oSmtp->ServerAddr = _T(""); 

    _tprintf(_T("Start to test email address...\r\n" )); 

    if( oSmtp->TestEmailAddr() == 0 ) 
        _tprintf( _T("email was verified!\r\n")); 
        _tprintf( _T("failed to test email address with the following error: %s\r\n"), 
            (const TCHAR*)oSmtp->GetLastErrDescription()); 

    if( oSmtp != NULL ) 

    return 0; 

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