Re: g.root-servers.net returns NXDOMAIN for com.

check carefully. most root servers are no longer authoritative for gTLDs. The gTLDS are being moved to their own machines.

g.root-servers.net is returning NXDOMAIN for all .com domains, and in fact the com zone itself. This causes all access to all of .com to fail, mail to bounce, and much woe overall.