I have not defined any administrative policy. Starting from yesterday I was able to send mails to users under the same server, but not to any other users.
I can receive mails from Internet. and from users sitting on other servers on our LAN (one server in the US and Australia - My server is in Paris)
I have a queue " Messages with an Unreachable destination " where all mails are stuck.
Can you please help? I have already rebooted the server, check the settings and don't know where to look...
Any quick response is much appreciated.