Re: [Exim] host_reject influences DNS-checks?

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Author: Philip Hazel
Date:  
To: Jan Schreckenbach
CC: exim-users
Subject: Re: [Exim] host_reject influences DNS-checks?
On Tue, 21 Nov 2000, Jan Schreckenbach wrote:

> does this mean the use of a lsearch will ever cause a reverse DNS
> lookup?


Only when it needs to find a host name.

> It would be nice if somebody, with a profound knowledge of the options,
> could write a short paragraph for the docu/FAQ. I would sugest a list of
> options where IP numbers or wildcarded hostnames are possible and in
> which
> cases DNS lookups are required.


The list is all those options whose type is "host list".

The manual contains section 7.15 "Host Lists", which explains in great
detail which type of item may cause a DNS lookup. Basicall, it does a
DNS lookup when it needs to match against a host name.

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.