On Fri, Jun 27, 2014 at 10:40 AM, Alex-P. Natsios <apnatsios@xxxxxxxxx> wrote: > Yes underscores in names are not supported according to RFC 952 > Not every idiocy out there should get standardized or de facto > standardized. > Seems underscores in domain names are allowed, just not in hostnames. See: http://stackoverflow.com/questions/2180465/can-someone-have-a-subdomain-hostname-with-an-underscore-in-it -scottmc