not accepting email

[mbttechnology]

when i setup an account the error i see on top of the page is

Warning: checkdnsrr() is not supported in this PHP build in C:webspaceresadminmbtstorembtstore.comwwwincludesfunctionsvalidations.php on line 126

 

Warning: checkdnsrr() is not supported in this PHP build in C:webspaceresadminmbtstorembtstore.comwwwincludesfunctionsvalidations.php on line 126

and on the form the email feild on the side is in red.

Thanks for any hekp you can give

 

Lee