Author: Steffen Evers Date: To: exim-users, debian-testing Subject: Re: [Exim] Preventing exim from querying dns for localhost
On Sat, Nov 10, 2001 at 16:21, Philip Hazel wrote: > I have had a thought. If you do NOT set primary_hostname, Exim will call
> the uname() function to find the name. If it then finds a name that is
> not fully qualified (that is, if there is no '.' in the name), Exim will
> call gethostbyname() in order to find the fully qualified name. (This is
> all documented under 'primary_hostname'). The gethostbyname() may be
> what is doing the DNS lookup. When you set primary_hostname explicitly,
> it won't do this.
>
> Exim really expects to operate with a fully qualified host name, because
> hosts on the Internet are supposed to have such names.
On Sat, Nov 10, 2001 at 18:09, Jö Fahlke wrote: > Mail is usually delivered acording to MX records in the DNS. But there
> are simply no MX records in /etc/hosts, so exim has look up the name
> via DNS. This behaviour can be tuned by the "gethostbyname" option to
> the "smtp" transport, AFAIK.
>
> Of course, this is no explanation for the 'exim -bp' problem.
This might be the explanation! As the meachanism Philip described is
true for 'exim -bp' as well!
However, setting primary_hostname causes another problem I have
described earlier: any remote delivery fails.
