On Fri, 24 Apr 1998, Moritz Both wrote:
> The lookuphost router 'qualify_single' option defaults to true. I want to
> suggest to change it to default to false. If 'qualify_single' is true,
> changes of the resolver configuration can have unwanted and unexpected
> results.
However, I suspect a lot of sites rely on this, and changing it would
break them when they upgrade to a new release.
> Exim's lookuphost router tries to route all mail to a host name resulting in
> appending the value of the 'domain' setting in /etc/resolv.conf to the
> domain part of the mail's original destination address. If there is a
> wildcard MX record for the value of the 'domain' setting in
> /etc/resolv.conf, =all= mail routed by the lookuphost router will get
> delivered to the host named in the wildcard MX record.
>
> Also, the name of the 'qualify_single' setting might be misleading since all
> addresses are qualified (at first try), no only those without a dot.
That is not true, at least on the resolvers I've seen. The
"search_parents" option WAS changed from TRUE to FALSE because of
precisely this problem with domains containing multiple components.
> After all this problem might also be related to our resolver which is rather
> old (SunOS 4.1.3 original), I'm not sure about this point.
Yes, I think it might be.
--
Philip Hazel University Computing Service,
ph10@??? New Museums Site, Cambridge CB2 3QG,
P.Hazel@??? England. Phone: +44 1223 334714
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