Re: [Exim] contrib: testing relaying without learning SMTP

woods@??? (Greg A. Woods) wrote on 27.08.99 in <m11KVdK-000g5eC@???>:

> Regardless, if there's some kind of version of BIND installed then
> nslookup will almost certainly be there too since it's been part of the
> BIND distribution for a long time.
>
> However isn't this thread about SMTP? SMTP requires DNS and as such the
> machine running Exim doing SMTP and using DNS will likely have nslookup
> available on it.

That's faulty logic. You don't need to have BIND installed to get DNS, you
just need a resolver library (that is, you need a DNS client, but not a
DNS server).

Now it is certainly a good idea, if you have a busy mail server, to run at
least a caching DNS server on the same machine so as to minimize network
traffic. But that's not the only type of Exim installation there is.

MfG Kai