@morrow without logs this will be hard to track down. can you ask your administrator to open up a support case for this?
Use debconf to configure Exim4 for which domains Exim should consider itself as the final destination. You can do this with the following command:
dpkg-reconfigure plow exim4
Create a file called 700_exim4-config_zarafa in the directory /etc/exim4/conf.d/router. Add the following text in the file:
debug_print = "R: zarafa for $local_part@$domain"
driver = accept
domains = +local_domains
transport = zarafa_pipe
require_files = +/usr/bin/zarafa-dagent
Create a file called 30_exim4-config_zarafa_pipe in the directory /etc/exim4/conf.d/transport. Add the following lines to the file:
debug_print = "T: zarafa_pipe for $local_part@$domain"
driver = pipe
path = "/bin:/usr/bin:/usr/local/bin"
command = "/usr/bin/zarafa-dagent $local_part"
Finally you need to add the following line to the file /etc/exim4/update-exim4.conf:
Now start the update-exim4.conf script and reload Exim4 with the following commands: