Author: Thomas Jacob Date: To: Exim Users List Subject: Re: [exim] Preventing TXT lookups after successful acl
modifierdnslists processing
> I have my own local dnsbl (using wrblnsd). Certainly from the rbl end it > appears that Exim does in fact make 2 queries, but the TXT query is
> unnecessary most of the time (when a lookup returns NXDOMAIN), so unless
> your lookups are more than say 20% positive, it's hardly going to save much
> bandwidth - my point being, is it worth the effort anyway ?
My lookups are more like 80%-90% positive, unfortunately. And it's not
so much about bandwidth but about speeding up acl processing (to reduce
the number of parallel smtp connections at any one time) and to
reduce the load on our name servers, at least that's what I hope it will
do ;-)
