Unexpected error when delivering message to user

[rudi]

I hope someone can help me. I get this error and the local delivery doesn't delivery any mail to the mailbox.

SERIOUS ERROR Local Delivery(Local Delivery) 11.24.11 07:47:28
[OM 7743] Unexpected error when delivering message to user: sxadmin/SCALIX
User Name: sxadmin / SCALIX/CN=sxadmin
Current errno value: 2
Last Msg Subject: TEST4
Last Msg Sender: user.surname/internet
Last Msg Id: H000007b00add860.1322117236.domain.com

[ls-al]

Have you done what omsolve is suggesting for OM 7743?
Hyve you tried to clean up the INBOX manually?
I dont know if the error 2 in this case means the same but usually its an indication for "theres something missing".