Re: Configuring Exim for mail delivery
On Sun, Oct 02, 2016 at 09:17:58AM -0400, Gene Heskett wrote:
> On Sunday 02 October 2016 08:41:50 Mark Fletcher wrote:
>
> > On Sun, Oct 02, 2016 at 12:52:44PM +0100, Brian wrote:
> > > [Some snipping. Not too much, I hope].
> > >
> > > On Sun 02 Oct 2016 at 01:05:20 +0100, Liam O'Toole wrote:
> > > > On 2016-10-01, Brian <ad44@cityscape.co.uk> wrote:
> > > > > Exim's default behaviour, as has been mentioned a couple of
> > > > > times in this thread, is to use DNS; nsswitch is not involved.
> > > >
> > > > Doing an strace on the exim command shows that /etc/nsswitch is
> > > > consulted first, then /etc/resolv.conf (followed by a DNS lookup
> > > > of the smarthost).
> > >
> > > This is what I cannot get round. I'm prepared to accept that my
> > > understanding may be defective but when I see "driver = dnslookup"
> > > in router/200_exim4-config_primary it fits what I observe. Which is
> > > why I use a hubbed_hosts file to manually route mail to machines on
> > > the LAN.
> > >
> > > > > This is a default
> > > > > exim install; no files in conf.d altered. How about you?
> > > >
> > > > No alterations I can remember, and 'dpkg --verify' reports no
> > > > changes to exim4-related files. All customisations have been done
> > > > via debconf. I am reluctant to divulge those customisations here,
> > > > but I can tell you that the settings are not particularly exotic.
> > > > One host on the local network is configured to use my ISP's SMTP
> > > > server as its smarthost, while the other hosts in turn use the
> > > > former as their smarthost.
> > >
> > > I have the same setup and all customisations (apart from
> > > hubbed_hosts) have been done via debconf. TBH, I cannot see why
> > > /etc/hosts should be consulted because I thought there is first a
> > > check for an MX record and then an attempt to resolve the host
> > > *using the DNS* if there was none.
> > >
> > > Your instructions are clear so I can continue to try more
> > > customising via debconf.
> > >
> > > mo appears to have had no more success than I have. Don't know about
> > > Mark.
> > >
> > > --
> > > Brian
> >
> > That's twice you've mentioned conf.d now, bear in mind in a
> > defaults-accepting Debian installation of exim4, it's not used.
> >
> > Mark
>
> Uuh, Mark, here on an up to date wheezy install, with exim4's default
> config untouched, it does indeed exist, as /etc/exim4/conf.d, and its
> populated with quite a few subdirs.
> =========
Yup, here too. But it is not being used.
Mark
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