Sending mail through smtp servers in php

By default the php provides mail function of it's own.But in some servers this will not work.Or there may be situation arise when your network ip may be blacklisted.so the every mail you have send is regarded as spam by most mail servers so their arise situation where you have to send mail using smtp server.Iam not ensuring that it works with all smtp servers,but it will work with most smtp servers. try it................
<?php

$from="yourmail@gmail.com";
$namefrom="name";
$to = "receivermail@gmail.com";
$nameto = "litzr";
$subject = "haaai";
$message = "Email from My Domain";
$smtpServer = "smtpserverip"; //ip address of the mail server. This can also be the local domain name
$port = "25"; // should be 25 by default, but needs to be whichever port the mail server will be using for smtp
$timeout = "45"; // typical timeout. try 45 for slow servers
$username = "usernameXXXX"; // the login for your smtp
$password = "XXXXX"; // the password for your smtp
$localhost = "localhost"; // Defined for the web server. Since this is where we are gathering the details for the email
$newLine = "\r\n"; // aka, carrage return line feed. var just for newlines in MS
$secure = 0; // change to 1 if your server is running under SSL

//connect to the host and port
$smtpConnect = fsockopen($smtpServer, $port, $errno, $errstr, $timeout);
$smtpResponse = fgets($smtpConnect, 4096);
if(empty($smtpConnect)) {
$output = "Failed to connect: $smtpResponse";
echo $output;
return $output;
}
else {
$logArray['connection'] = "<p>Connected to: $smtpResponse";
echo "<p />connection accepted<br>".$smtpResponse."<p />Continuing<p />";
}

//you have to say HELO again after TLS is started
fputs($smtpConnect, "HELO ".$localhost.$newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['heloresponse2'] = $smtpResponse;
//request for auth login
fputs($smtpConnect,"AUTH LOGIN" . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['authrequest'] = $smtpResponse;

//send the username
fputs($smtpConnect, base64_encode($username) . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['authusername'] = $smtpResponse;

//send the password
fputs($smtpConnect, base64_encode($password) . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['authpassword'] = $smtpResponse;

//email from
fputs($smtpConnect, "MAIL FROM: <$from>" . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['mailfromresponse'] = $smtpResponse;

//email to
fputs($smtpConnect, "RCPT TO: <$to>" . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['mailtoresponse'] = $smtpResponse;

//the email
fputs($smtpConnect, "DATA" . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['data1response'] = $smtpResponse;

//construct headers
$headers = "MIME-Version: 1.0" . $newLine;
$headers .= "Content-type: text/html; charset=iso-8859-1" . $newLine;
$headers .= "To: $nameto <$to>" . $newLine;
$headers .= "From: $namefrom <$from>" . $newLine;

//observe the . after the newline, it signals the end of message
fputs($smtpConnect, "To: $to\r\nFrom: $from\r\nSubject: $subject\r\n$headers\r\n\r\n$message\r\n.\r\n");
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['data2response'] = $smtpResponse;

// say goodbye
fputs($smtpConnect,"QUIT" . $newLine);
$smtpResponse = fgets($smtpConnect, 4096);
$logArray['quitresponse'] = $smtpResponse;
$logArray['quitcode'] = substr($smtpResponse,0,3);
fclose($smtpConnect);
//a return value of 221 in $retVal["quitcode"] is a success
print_r($logArray);




?>