<?phpfunction is_email_type($email) { $email_types = array('gmail', 'yahoo', 'hotmail'); foreach ($email_types as $type) { if (strpos($email, '@'.$type) !== false) return true } return false;}if($_POST['button']){ if($_POST['subject'] && $_POST['message']) { if(is_email_type($_POST['email'])) { $email = $_POST['email']; $toemail = "antonnid@gmail.com"; $subject = $_POST['subject']; $message = $_POST['message']; if(mail($toemail, $subject, $message, "From: $email")) echo "Your message has been sent. I will reply as soon as i can i apreaciate your suggestions."; else echo "Error sending email!"; } else echo "Invalid Email!"; } else echo "One or more of the required fields was not filled out!";}?>