"Lose the connexion IMAP"

Hi,

I enabled IMAP on domino server and I convert my mail files. The firewall is configured too. I’m in the group : full access administration.

When I try to connect to the server (when I’m in our network not outside) with “telnet mymailserver 143” or with outlook for example, it says :

“Domino IMAP4 Server Unable to authenticate session. This site is not enabled on the server.”

I connect on the server and immediately I lose the connexion.

Dou you have any ideas what I can change in my configuration?

Regards,

E.H.