Our IT guy has actually just blackholed all mail from any of the new TLDs. I don't know exactly what he did, but I suspect it's just a whitelist containing "TLDs from before the Great TLD Expansion." I don't think I've ever seen a legitimate website from one of the new TLDs, and to be honest I'm still suspicious of most country code TLDs.
The new TLDs are a massive problem disguised as a solution in search of a problem.