On Fri, Jun 22, 2018 at 4:42 PM, Eric Covener <[email protected]> wrote:
> > should have broken IDN (punycode) international domain names. > > those are obviously dashes, not underscores, so not affected at all. > That assertion was a bit extreme :) But on principal, underbars are not valid (internet) DNS, but seem widely deployed in the intranet, notably a certain M$ who has actively endorsed and promoted them to sysadmins. I'd say let them pass, in that it shouldn't matter if a_b isn't resolvable any more or less than axb is resolvable. There is no ambiguity in the designation that I'm aware of.
