Code:

require_once "../Mail.php";
require_once "../Mail/mime.php";

$subject = "Ovde ide subject poruke";
$mail_to = "[email protected]";
$mail_from = "[email protected]";
$host = "smtp.nesto.com"; //ovde ide smtp server
$username = "[email protected]"; //ovde ide username 
$password = "password"; //ovde ide password

$smtp = Mail::factory('smtp',
 array (
 'host' => $host,
 'auth' => true,
 'username' => $username,
 'password' => $password
));

$headers["From"] = $mail_from;
$headers["To"] = $mail_to;
$headers["Subject"] = $subject;
$headers["Content-Type"] = 'text/html; charset=UTF-8';
$headers["Content-Transfer-Encoding"]= "8bit";

// Tekst poruke ***

$html_message="<p>Zdravo Miko</p>";
$html_message.="<p>Mi smo dobro, nadam se da ste i vi</p>";
$html_message.="<p>Pozdrav!</p>";


// Aktiviranje MIME biblioteke ***
$mime = new Mail_mime;
$mime->setTXTBody($text);
$mime->setHTMLBody($html_message);
$mimeparams=array(); 

$mimeparams['text_encoding']="8bit";
$mimeparams['text_charset']="UTF-8";
$mimeparams['html_charset']="UTF-8";
$mimeparams['head_charset']="UTF-8";
$mimeparams["debug"] = "True";

// Postavljanje mime poruke i header-a ***

$body = $mime->get($mimeparams);
$headers = $mime->headers($headers); 

// Slanje mail-a ***

$mail = $smtp->send($mail_to, $headers, $body);

if (PEAR::isError($mail)) {
echo 'PEAR error in module: MAIL';         
} else { 
echo 'Mail sent!';
}

Code:
<form action="slanje.php" method="post" id="contactform">
            <ol>
              <li>
                <label for="name">First Name <span class="red">*</span></label>
                <input id="name" name="name" class="text" />
              </li>
              <li>
                <label for="email">Your email <span class="red">*</span></label>
                <input id="email" name="email" class="text" />
              </li>
              <li>
                <label for="company">Company Name</label>
                <input id="company" name="company" class="text" />
              </li>
              <li>
                <label for="message">Message <span class="red">*</span></label>
                <textarea id="message" name="message" rows="6" cols="50"></textarea>
              </li>
              <li class="buttons">
                <input type="image" name="imageField" id="imageField" src="images/send.gif" />
              </li>
          </ol>
        </form>

Code:
<?php

if(!$_POST) exit;

$email = $_POST['email'];


//$error[] = preg_match('/\b[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/i', $_POST['email']) ? '' : 'INVALID EMAIL ADDRESS';
if(!eregi("^[a-z0-9]+([_\\.-][a-z0-9]+)*" ."@"."([a-z0-9]+([\.-][a-z0-9]+)*)+"."\\.[a-z]{2,}"."$",$email )){
    $error.="Invalid email address entered";
    $errors=1;
}
if($errors==1) echo $error;
else{
    $values = array ('name','email','message');
    $required = array('name','email','message');
     
    $your_email = "[email protected]";
    $email_subject = "New Message: ".$_POST['subject'];
    $email_content = "new message:\n";
    
    foreach($values as $key => $value){
      if(in_array($value,$required)){
        if ($key != 'subject' && $key != 'company') {
          if( empty($_POST[$value]) ) { echo 'PLEASE FILL IN REQUIRED FIELDS'; exit; }
        }
        $email_content .= $value.': '.$_POST[$value]."\n";
      }
    }
     
    if(@mail($your_email,$email_subject,$email_content)) {
        echo 'Message sent!'; 
    } else {
        echo 'ERROR!';
    }
}
?>

Code:
$value){ if(in_array($value,$required)){ if ($key != 'subject' && $key != 'company') { if( empty($_POST[$value]) ) { echo 'PLEASE FILL IN REQUIRED FIELDS'; exit; } } $email_content .= $value.': '.$_POST[$value]."\n"; } } if(@mail($your_email,$email_subject,$email_content)) { echo 'Message sent!'; } else { echo 'ERROR!'; } } ?>