폼메일 여러명에게 발송하고 싶다면..

<meta charset="utf-8">
<?php
$email_to = "받는사람메일입력";
$email_from = "보내는 사람 메일입력";
$email_subject = "[상담문의] 홈페이지에서 들어온 문의";
$email_subject = '=?UTF-8?B?'.base64_encode($email_subject).'?=';
 
function died($error) {
 // your error code can go here
 echo "<script> alert('입력이 올바르지 않습니다.');";
 echo "history.go(-1);";
 echo "</script>";
 die();
}
 
// validation expected data exists
if(!isset($_POST['first_name']) ||
 !isset($_POST['telephone']) ||    
 !isset($_POST['company_name']) ||    
 !isset($_POST['email']) ||    
 !isset($_POST['content'])){
 died('We are sorry, but there appears to be a problem with the form you submitted.');      
}
 
$first_name = $_POST['first_name']; // required
$telephone = $_POST['telephone']; // not required
$company_name = $_POST['company_name']; // not required
$email = $_POST['email']; // not required
$content = $_POST['content']; // not required
 
$error_message = "";
$email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+.[A-Za-z]{2,4}$/';
if(!preg_match($email_exp,$email_from)) {
 $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
}
if(strlen($error_message) > 0) {
 died($error_message);
}
$email_message = "";
 
function clean_string($string) {
  $bad = array("content-type","bcc:","to:","cc:","href");
  return str_replace($bad,"",$string);
}
 
$email_message .= "이름 : ".clean_string($first_name)."\n\n";
$email_message .= "연락처 : ".clean_string($telephone)."\n\n";
$email_message .= "회사명 : ".clean_string($company_name)."\n\n";
$email_message .= "이메일 : ".clean_string($email)."\n\n";
$email_message .= "상담내용 : ".clean_string($content)."\n\n";
    
// create email headers
$headers = 'From: '.$email_from;
// 제목이 깨질경우 아래 캐릭터셋 적용
@mail($email_to, $email_subject, $email_message, $headers); 
?>
 
<!-- include your own success html here -->
 
<script>
alert ("메일이 발송되었습니다.\n빠른 시일안에 답변드리겠습니다.");
location.href='../';
</script>