> > The problem is that user@ai is not globally unique. > > > > MIT users will have problems talk to user@ai when "ai" means > > Anguilla. The is a current security issue. > > > > If / when MIT stop using ai.mit.edu, "user@ai" will not longer > > mean user@xxxxxxxxxxx This will mean that any configuration file > > that has "user@ai" will now, suddenly, get a different meaning. > > This is a latent security issue. > > If by "latent" you mean "so obscure that in the ten years that there's > been A and MX records at TLDs nobody's been affected" I guess I agree. Again you are asserting that no one has ever been effected. By latent, I mean it will cause problems in the future when the conditions described are met. Not every action has a immediate consequence. Some consequences can happen years after the initial action was taken. The consequences here are foreseeable but not necessarially obvious to everyone affected. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@xxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf