Non-authoritative answer: dbdb.net mail exchanger = 0 aspmx.l.google.com. dbdb.net mail exchanger = 5 alt1.aspmx.l.google.com. dbdb.net mail exchanger = 10 alt2.aspmx.l.google.com.
Authoritative answers can be found from: dbdb.net nameserver = ns3.zoneedit.com. dbdb.net nameserver = ns18.zoneedit.com. aspmx.l.google.com internet address = 74.125.53.27 alt1.aspmx.l.google.com internet address = 209.85.225.27 alt2.aspmx.l.google.com internet address = 74.125.65.26 ns3.zoneedit.com internet address = 76.74.236.21