Liam O'Toole <liam.p.oto...@gmail.com> writes:

[...]

>> When I try to send a message from USER@HOST2 to USER@HOST1, instead of
>> just delivering to USER@HOST1 it appears to be sending that message on
>> to the gmail smtp server.
>>
>> The local lan is not a real FQDN so not suprising that the gmail
>> server cannot deliver it.... but how to prevent that local mail from
>> being sent to gmail server to start with?
>>
>>
>
> You need to tell exim4 on HOST1 that it is the 'final destination' for
> emails within your local network. If you go back through the debconf
> questions for exim4-config, you'll be asked about 'Other destinations
> for which mail is accepted'. In your case the answer should be
> '*.local.lan'. Then local emails will no longer be forwarded upstream.
> Obviously, you will need to ensure that the various local fully
> qualified domain names are resolvable, either by running your own DNS or
> maintaining /etc/host files correctly.

Thank you.  That fixed HOST1.  Still haven't worked out how to be able
to send mail from a user@HOST2 to a user@HOST1 (both inside home lan ).

With the setting you suggest above... mail from user@HOST2 to
user@HOST1 fails with smtp output:

  sending like this:
  mailx -v -s "TEST 161001_092048 d2" ha...@dv.local.lan < ~/txtmsg.txt
  LOG: MAIN
    <= ha...@d2.local.lan U=harry P=local S=442
  delivering 1bqKDj-00009o-AK
  R: smarthost for ha...@dv.local.lan
  T: remote_smtp_smarthost for ha...@dv.local.lan
  LOG: MAIN
    ** ha...@dv.local.lan R=smarthost T=remote_smtp_smarthost: retry time not 
reached for any host after a long failure period
  LOG: MAIN
    <= <> R=1bqKDj-00009o-AK U=Debian-exim P=local S=1680
  LOG: MAIN
    Completed
  delivering 1bqKDj-00009s-Hi
  R: system_aliases for ha...@d2.local.lan
  R: userforward for ha...@d2.local.lan
  R: procmail for ha...@d2.local.lan
  R: maildrop for ha...@d2.local.lan
  R: lowuid_aliases for ha...@d2.local.lan (UID 1000)
  R: local_user for ha...@d2.local.lan
  T: appendfile for ha...@d2.local.lan
  LOG: MAIN
    => harry <ha...@d2.local.lan> R=local_user T=mail_spool
  LOG: MAIN
    Completed

And from /var/log/exim4/mainlog:

  2016-10-01 09:20:51 1bqKDj-00009o-AK <= ha...@d2.local.lan U=harry P=local 
S=442
  2016-10-01 09:20:51 1bqKDj-00009o-AK ** ha...@dv.local.lan R=smarthost 
T=remote_smtp_smarthost: retry time not reached for any host after a long 
failure period
  2016-10-01 09:20:51 1bqKDj-00009s-Hi <= <> R=1bqKDj-00009o-AK U=Debian-exim 
P=local S=1680
  2016-10-01 09:20:51 1bqKDj-00009o-AK Completed
  2016-10-01 09:20:51 1bqKDj-00009s-Hi => harry <ha...@d2.local.lan> 
R=local_user T=mail_spool
  2016-10-01 09:20:51 1bqKDj-00009s-Hi Completed

I think those ouputs mean that the local mail being sent from HOST2 to
HOST1 is still attempting to be sent to smtp.gmail.com (The smarthost
for HOST1)

I have HOST2 set like this in /etc/exim4/update-exim4.conf.conf:

  dc_eximconfig_configtype='smarthost'
  dc_other_hostnames=''
  dc_local_interfaces='127.0.0.1 ; ::1'
  dc_readhost='d2.local.lan'  # (HOST2)
  dc_relay_domains=''
  dc_minimaldns='false'
  dc_relay_nets=''
  dc_smarthost='dv.local.lan' # (HOST1)
  CFILEMODE='644'
  dc_use_split_config='false'
  dc_hide_mailname='false'
  dc_mailname_in_oh='true'
  dc_localdelivery='mail_spool'

Is this wrong?  Is setting HOST1 as smarthost for HOST2 a mistake?

Contents of /etc/exim4/update-exim4.conf.conf on HOST1

  dc_eximconfig_configtype='smarthost'
  dc_other_hostnames='*.local.lan' # NOTE: This was supposed to tell
                                   # HOST1 that mail from the local
                                   # lan is to be delivered to local
                                   # users... not sent to smarthost 
        
  dc_local_interfaces='127.0.0.1 ; ::1'
  dc_readhost=''
  dc_relay_domains=''
  dc_minimaldns='false'
  dc_relay_nets='192.168.1.0/24'
  dc_smarthost='smtp.gmail.com::587'
  CFILEMODE='644'
  dc_use_split_config='false'
  dc_hide_mailname='false'
  dc_mailname_in_oh='true'
  dc_localdelivery='mail_spool'
  smtp_accept_queue_per_connection=300 

The attempted send from HOST2 to HOST1 does not appear in the
/var/log/exim4/mainlog on HOST1 at all.

I'm sorry to be so confused about setting this up... but am pretty
confused at this point.

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