--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===