On Tue, April 13, 2010 23:38, W B Hacker wrote: > In RFC 822 et seq, how do you interpet the 'MUST' with regard to; > > "6. SUPPORT SERVICES > > > 6.1 DOMAIN NAME TRANSLATION > > 6.1.1 INTRODUCTION > > Every host MUST implement a resolver for the Domain Name System > (DNS), and it MUST implement a mechanism using this DNS > resolver to convert host names to IP addresses and vice-versa > [DNS:1, DNS:2]. > " > > also summarized in tabular form in 6.1.5 > > How can it accomplish that both way lookup requirement if there are no > records > with which to do so?
It doesn't say a host MUST succeed at resolving, it says it MUST provide a mechanism by which an attempt at resolving can be made. That's a very very different thing to what you seem to interpret it to mean. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
