Jon Nelson writes:

queries.  The problem here, of course, is that names like 'localhost'
and 'localhost.localdomain' do not resolve.  What I'm trying to
understand, MrSam, is the rationale for doing things this way?

A couple of reasons:

A) IPv6 (not implemented in the legacy resolver routines)
B) The resolver routines must do more than just address lookups, namely
MX and PTR records.

And, it's not clear to me what's the issue with couriertls not resolving stuff from /etc/hosts. All that means is that the IP address's hostname won't get picked up. Big deal.


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