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From: Markus Ernst on 11 Feb 2010 04:02
James Collins schrieb:
> Hi Markus,
>
> Which operating system are you running your PHP code from?
>
> According to http://php.net/manual/en/function.checkdnsrr.php, the function
> might not exist if you're using Windows.
>
> I do not have any specific experience with the checkEmail() or checkdnsrr()
> functions, but I have successfully used PEAR's NET_DNS package (
> http://pear.php.net/package/Net_DNS) for querying DNS records on both
> windows and linux servers.

No, it is on a Linux system; the function usually returns correct
results, also for addresses on a sub domain. I have been using it for
years, and the problem only occurs with this special address. That makes
me think it is due to a quite special configuration of the systems this
address points to.
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