PHP send mail SMTP authentification

this is a very complete php send mail script, with authentification ofcourse.
You can choose the smtp server, use your username and password, and can send a html email.

This script does not use php mail() function, it's all from scrach.

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

$smtpServer = "";
$port = "25";
$timeout = "30";
$username = "";
$password = "mypassword";
$localhost = "localhost"; //hosting server
$newLine = "\r\n";

$smtpConnect = fsockopen($smtpServer, $port, $errno, $errstr, $timeout);
$smtpResponse = fgets($smtpConnect, 515);
$output = "Failed to connect: $smtpResponse";
return false;
} else {
$logArray['connection'] = "Connected: $smtpResponse";

//Request Auth Login

fputs($smtpConnect,"AUTH LOGIN" . $newLine);

$smtpResponse = fgets($smtpConnect, 515);

//Send username

fputs($smtpConnect, base64_encode($username) . $newLine);
$smtpResponse = fgets($smtpConnect, 515);

//Send password
fputs($smtpConnect, base64_encode($password) . $newLine);
$smtpResponse = fgets($smtpConnect, 515);

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

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

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

//The Email
fputs($smtpConnect, "DATA" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);

//Construct Headers
$headers = "MIME-Version: 1.0" . $newLine;
$headers .= "Content-type: text/html; charset=iso-8859-1" . $newLine;
//Add these two lines if you have any problem
//$headers .= "To: $nameto <$to>" . $newLine;

//$headers .= "From: $namefrom <$from>" . $newLine;

fputs($smtpConnect, "To: $nameto <$to>\nFrom: $namefrom <$from>\nSubject: $subject\n$headers\n\n$message\n.\n");
$smtpResponse = fgets($smtpConnect, 515);

// Say Bye to SMTP
fputs($smtpConnect, "QUIT" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);

return true;


That's it, just copy this mail SMTP authentification function and change configuration variables values to your own (smtpserver, port, username, password, ...).


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