Bug#697612: exim4-daemon-light: "MAIN_LOCAL_DOMAINS=@:localhost" seems not to respect "@"

[Diego Guella]

Package: exim4-daemon-light
Version: 4.72-6+squeeze3

Same problem here.
The bad news is, this happened from today, with no configuration changes 
(that I know of) on the server.
The server is in production.

Local mails to root at localhost and user at localhost are delivered locally 
without problems, but local mails to root at devilserver.deviltechnologies.com 
does get sent to the smarthost.
The server configuration is some years old, and it worked perfectly until 
yesterday! (I get a daily mail from mdadm at 06:25 local time)
Today, I found that the mail was bounced and bounced again from my server 
and the smarthost, and then my server stopped trying, sending this error 
email message:
-----
Message 1Wcool-0001JR-Kw has been frozen (delivery error message).
The sender is <>.

The following address(es) have yet to be delivered:
  postmaster at devilserver.deviltechnologies.com: Too many "Received" 
headers - suspected mail loop
-----

update-exim4.conf.conf:
-----
dc_eximconfig_configtype='smarthost'
dc_other_hostnames=''
dc_local_interfaces=''
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='vps26197.ovh.net'
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
dc_localdelivery='maildir_home'
-----

Some other information:
-----
root at devilserver:/etc/exim4# uname -n
devilserver
root at devilserver:/etc/exim4# hostname
devilserver
root at devilserver:/etc/exim4# hostname -f
devilserver.deviltechnologies.com
root at devilserver:/etc/exim4# grep -v ^# /etc/hosts
127.0.0.1       localhost
192.168.200.249 devilserver.deviltechnologies.com       devilserver

::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
-----

I have BIND installed, version 1:9.7.3.dfsg-1~squeeze11

I tried Osamu Aoki's workaround 
(dc_other_hostnames='devilserver.deviltechnologies.com') and it fixes the 
problem for me, too.

I assume there is some deeply hidden misconfiguration of something other 
than exim on my server, or in my network.
Again, this setup has worked fine for some years.
I have a backup of the server configuration of some months ago, and I can 
double-check for changes in the configuration files.
Do somebody know where can I look at?


Thanks,
Diego