function authSendEmail($from, $namefrom, $to, $nameto,  
$subject, $message)  
{  
$smtpServer = "smtp.domain.tld";  
$port = "25";  
$timeout = "30";  
$username = "postmaster@domain.tld";  
$password = "YouPassword";  
$localhost = "localhost";  
$newLine = "\r\n";  

//Connect to the host on the specified port  
$smtpConnect = fsockopen($smtpServer, $port, $errno,  
$errstr, $timeout);  
$smtpResponse = fgets($smtpConnect, 515);  
if(empty($smtpConnect))  
{  
$output = "Failed to connect: $smtpResponse";  
return $output;  
}  
else  
{  
$logArray['connection'] = "Connected: $smtpResponse";  
}  

//Request Auth Login  
fputs($smtpConnect,"AUTH LOGIN" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['authrequest'] = "$smtpResponse";  

//Send username  
fputs($smtpConnect, base64_encode($username) . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['authusername'] = "$smtpResponse";  

//Send password  
fputs($smtpConnect, base64_encode($password) . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['authpassword'] = "$smtpResponse";  

//Say Hello to SMTP  
fputs($smtpConnect, "HELO $localhost" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['heloresponse'] = "$smtpResponse";  

//Email From  
fputs($smtpConnect, "MAIL FROM: $from" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['mailfromresponse'] = "$smtpResponse";  

//Email To  
fputs($smtpConnect, "RCPT TO: $to" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['mailtoresponse'] = "$smtpResponse";  

//The Email  
fputs($smtpConnect, "DATA" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['data1response'] = "$smtpResponse";  

//Construct Headers  
$headers = "MIME-Version: 1.0" . $newLine;  
$headers .= "Content-type: text/html;  
charset=windows-1251" . $newLine;  
$headers .= "To: $nameto <$to>" . $newLine;  
$headers .= "From: $namefrom <$from>" . $newLine;  

fputs($smtpConnect, "To: $to\nFrom: $from\nSubject:  
$subject\n$headers\n\n$message\n.\n");  

$smtpResponse = fgets($smtpConnect, 515);  
$logArray['data2response'] = "$smtpResponse";  

// Say Bye to SMTP  
fputs($smtpConnect,"QUIT" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['quitresponse'] = "$smtpResponse";  
}  

//new function  

$to = "postmaster@domain.tld";  
$nameto = "Demo User";  
$from = "postmaster@domain.tld";  
$namefrom = "Postmaster";  
$subject = "Hello World Again!";  
$message = "World, Hello!";  

authSendEmail($from, $namefrom, $to, $nameto,  
$subject, $message);