Those idiots from Verisign are breaking internet and this breakage affected Mail::CheckUser. Rob Brown patched Mail::CheckUser to stop accepting bogus domains and I've just uploaded a new version (1.21) on CPAN.
If you use or develop any software affected by Verisign "innovations" you may find this page interesting.
In other news Verisign was sued over new VeriSign's "services". I hope Verisign will burn in hell.
Update: Those Verisign monkeys cannot even write simple search page without XSS bugs. See here (warning - explicit content). I've made a screenshot in case they fix it. Thanks to Pan T. Hose from slashdot for spoting it.