تنظیمات ارسال ایمیل فارسی در php

mail(to,subject,message,headers,parameters);

<?php

$to = 'backendbaz@gmail.com';
$message = 'متن ایمیل';
$subject = 'اطلاعیه';

$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";
$sub = '=?UTF-8?B?'.base64_encode($subject).'?=';

mail($to,$sub,$message,$headers);
<?php

$to = 'backendbaz@gmail.com';
$message = 'متن ایمیل';
$subject = 'اطلاعیه';

$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";
$sub = '=?UTF-8?B?'.base64_encode($subject).'?=';

mail($to,$sub,$message,$headers);اجرای کد