Mailbox does not exist

[Jan - Hendrik Meyer]

 Hello,

after I installed so SuSe integration package sucessfully, I've started 
to integrate Linux authentification with ldap. I used the LDAP Account 
Manager to manage the account. I created a account with the unix schemas 
and the kolab schemas for testing.
I can login the xserver and a mailbox has also been created.

But there is one error:

lmtp[29919]: verify_user(home!user.norbertlang) failed: Mailbox does not exist

I think the cause could be that the user name need to be different to the username, 
if I use the kolab and unix schema 
(because the username doesn't support the @)

Are there any solutions?

Thanks

Jan-Hendrik