On Sat 01 Oct 2016 at 12:36:10 +0200, mo wrote: > >I just figured out how to get this working myself a week or two back, so > >it's fresh in my mind. The key trick is the use of "hubbed hosts". > > Did you follow a specific book or guide?
The manual for exim4-config_files is the first place to look. > >Exim configuration has the concept of "routers" and "transports". > >Routers basically decide what to do with a message, and transports do > >it. One of the routers configured by default in the Debian exim > >configuration is for "hubbed hosts". What this means, is machines > >capable of sending and receiving email ("hosts" in exim speak) that are > >on the same LAN as this machine (connected by a "hub"). Note that this > >"hub" could be your local home network router, and for these purposes > >machines on WiFi and machines on a wired LAN would be considered on the > >same hub, even though that isn't strictly true. The point is that > >network packets can be addressed directly between the machines, they > >don't require a router in between. > > > > As far as i do understand this is that only machines which are defined as > hubbed hosts can be send mail in the local LAN? Or am i misunderstanding > something here? :) hubbed_hosts can send mail wherever you want. For example: example.com: smtp.example.com would send mail to someone at example.com through smtp.example.com (which could be a smarthost). > >In Debian, this is achieved with Avahi. This is what allows you, if you > >have MachineA and MachineB on your network, to do for example "ping > >MachineA.local" from MachineB and expect MachineA.local to be resolved > >into an IP address. > > > > I'm not a friend of avahi to be honest, i much rather ignore it :D Let's hope your IP addresses do not change. > >In /etc/exim4, create a file owned by root called hubbed_hosts. In the > >file, each line maps a "domain" (the part after the @ sign in an email > >address) to a "host" (the name of a machine on your network, as it can > >be reached from this machine). Put the domain first, then a tab > >character (spaces may also be OK) and then the host. So for example I > >have a machine on my network called affinity, and so in the hubbed_hosts > >file on the machine I am sitting in front of now, I have two lines, one > >saying "affinity.local<TAB>affinity.local", and the other saying > >"affinity<TAB>affinity.local" (no quotes in the file). This tells the > >local exim installation that any email address with @affinity.local as > >the domain should be forwarded on to a machine called affinity.local, > >and any mail with @affinity as the domain should be forwarded on to a > >machine called affinity.local. Exim4 will then say "Connect to > >affinity.local!" with no attempt to translate that into an IP address, > >and Avahi daemon will answer "that is IP address WW.XX.YY.ZZ!" to which > >exim will say "very well, connect to WW.XX.YY.ZZ!" and the exim4 on > >affinity will wake up and co-operate to deliver the mail. > > I just did that and now mailing works flawlessly :D > Just one questions: Why do i need hubbed_host entries? Should it not be fine > alone to make a entry in /etc/hosts for the machines i want to send mail to > (I do not operate a dedicated DNS server). > This is something i dont really understand... I'd suggest you try it and look at the logs. -- Brian.