Re: Configuring Exim for mail delivery
On Sat 01 Oct 2016 at 21:52:53 +0100, Liam O'Toole wrote:
> On 2016-10-01, Brian <ad44@cityscape.co.uk> wrote:
> > On Sat 01 Oct 2016 at 17:25:46 +0100, Liam O'Toole wrote:
> >
> >> On 2016-10-01, mo <mo777@gmx.net> wrote:
> >> > First of all:
> >> > Thank you Liam for your help! :)
> >> > Thanks for the very nice and long explanation Mark! :)
> >> >
> >> > I think i should elaborate a little more on my setup.. i guess i did not
> >> > make that very clear in the first place, sorry about that.
> >> >
> >> > My network is consisting of the following systems:
> >> >
> >> > Main PC - 192.168.23.11 (Running Debian Jessie)
> >> > Server - 192.168.23.200 (Running Debian Jessie)
> >> >
> >> > The server is always online, the PC is only half of the day on.
> >> >
> >> > What i want to do now is the following:
> >> >
> >> > Sending mail from my Main PC to my Server and also the other way around,
> >> > from the Server to my Main PC.
> >> > The Server should also be able to send mail to the "outside" (Meaning to
> >> > other SMTP servers).
> >> > The second requirement is optional since i dont own a domain and all
> >> > this is sitting locally at my home. The most important thing for me is
> >> > to send and receive mail from both systems in my home network.
> >> > I hope this made my problem a little clearer :)
> >> >
> >> > I'm a little ashamed to say that, but i could not totally follow your
> >> > explanations Mark... I'm quite a newbie when it comes to SMTP.. sorry :(
> >> >
> >> > Thanks again for all your help ;)
> >> >
> >> > Greets
> >> >
> >> > mo
> >> >
> >> >
> >>
> >> I should have been a little clearer myself. You don't need to register a
> >> domain name. Just invent your own domain name for local purposes. Let's
> >> say you choose the domain name "monet", and that you have already given
> >> the hostnames "desktop" and "server" to your two machines. Then you
> >> would edit the file /etc/hosts on both machines to contain the following
> >> lines:
> >>
> >> 192.168.23.11 desktop.monet desktop
> >> 192.168.23.200 server.monet server
> >
> > I did that on gnome and desktop with appropriate changes:
> >
> > 192.168.7.20 desktop.monet desktop
> > 192.168.7.67 gnome.monet gnome
> >
> >> Now you only need to tell exim4 on the server that it is the final
> >> destination for emails to *.monet, again using the debconf wizard. You
> >> will then be able to send emails to local addresses, while emails to all
> >> other domains will go through your ISP's smarthost.
> >
> > I did that on gnome and desktop.
> >
> >> Incidently, you can also tell exim4 on the desktop to use the server as
> >> its smarthost.
> >>
> >> I realise that you're getting lots of (sometimes contradictory)
> >> information from various sources. The barebones configuration I have
> >> described above has served me well for several years.
> >
> > All commands are issued from gnome.
> >
> > brian@gnome:~# ping -c3 desktop
> > PING desktop.monet (192.168.7.20) 56(84) bytes of data.
> > 64 bytes from desktop.monet (192.168.7.20): icmp_seq=1 ttl=64 time=0.267 ms
> > 64 bytes from desktop.monet (192.168.7.20): icmp_seq=2 ttl=64 time=0.255 ms
> > 64 bytes from desktop.monet (192.168.7.20): icmp_seq=3 ttl=64 time=0.269 ms
> >
> > --- desktop.monet ping statistics ---
> > 3 packets transmitted, 3 received, 0% packet loss, time 2001ms
> > rtt min/avg/max/mdev = 0.255/0.263/0.269/0.019 ms
> >
> > brian@gnome:~# ping -c3 desktop.monet
> > PING desktop.monet (192.168.7.20) 56(84) bytes of data.
> > 64 bytes from desktop.monet (192.168.7.20): icmp_seq=1 ttl=64 time=0.264 ms
> > 64 bytes from desktop.monet (192.168.7.20): icmp_seq=2 ttl=64 time=0.255 ms
> > 64 bytes from desktop.monet (192.168.7.20): icmp_seq=3 ttl=64 time=0.255 ms
> >
> > --- desktop.monet ping statistics ---
> > 3 packets transmitted, 3 received, 0% packet loss, time 2002ms
> > rtt min/avg/max/mdev = 0.255/0.258/0.264/0.004 ms
> >
> > We expect that result because ping uses files in /etc/nsswitch.
> >
> > root@gnome:~# exim -bt brian@desktop
> > R: dnslookup for brian@desktop
> > brian@desktop is undeliverable: Unrouteable address
> >
> > root@gnome:~# exim -bt brian@desktop.monet
> > R: dnslookup for brian@desktop.monet
> > brian@desktop.monet is undeliverable: Unrouteable address
> >
> > Am I the only one who gets this? No capability to deliver mail to
> > desktop. What am I doing wrong?
> >
>
> exim seems to be trying to resolve desktop.monet via DNS, thus ignoring
> /etc/nsswitch. (I have no idea whether that is the default behaviour.) Do
> you have a local DNS capable of resolving the address?
Exim's default behaviour, as has been mentioned a couple of times in
this thread, is to use DNS; nsswitch is not involved. This is a default
exim install; no files in conf.d altered. How about you?
> You might try the mail command from the mailutils or bsd-mailx packages
> for comparison.
mail uses exim as the MTA. It is hardly likely to work.
--
Brian.
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