--TEST--
Bug #72463 mail fails with invalid argument
--SKIPIF--
<?php
if(substr(PHP_OS, 0, 3) == "WIN") {
	die('skip not for windows');
}
?>
--INI--
sendmail_path="echo >/dev/null"
--FILE--
<?php

mail("some.address.it.wont.ever.reach@lookup.and.try.to.find.this.host.name","subject","a", "");
mail("some.address.it.wont.ever.reach@lookup.and.try.to.find.this.host.name","subject","a", NULL);

?>
===DONE===
--EXPECTREGEX--
.*===DONE===