getmxrr hangs with tiscali

ajk_99

I have a site which relies on getmxrr to validate email domains. It's been working fine for ages. I have just discovered that when the domain name is "tiscali.co.uk" getmxrr doesn't work. Worse still, the whole site hangs. Whilst locating the problem I ended up with a script that couldn't be simpler but which doesn't work for the tiscali domain name.

<?
echo(getmxrr("tiscali.co.uk", $temp) . "<br/>");
print_r($temp);
?>

Has anyone got any ideas? Is there anyway to test it's not going to hang before running it?
Thanks

php 4.4.2 Linux Apache

Weedpacket

Well, now you know why the manual page for [man]getmxrr[/man] says

Note: This function should not be used for the purposes of address verification. Only the mailexchangers found in DNS are returned, however, according to RFC 2821 when no mail exchangers are listed, hostname itself should be used as the only mail exchanger with a priority of 0.

See that page for some other stuff about validating email addresses. One of the suggestions there is to attempt to open a socket on port 25 to the alleged server; if that succeeds you could then go HELO and see if you get a coherent (250) response back.

ajk_99

Inspite of that warning - getmxrr does seem to be used in tutorials and books for email validation. checkdnsrr doesn't have the same warning (should it?). But that's also hanging when I try it with tiscali.co.uk