Create new user

[JP Horst | ScienceBridge]

Hi all,

after upgrade to 3.3. I created a new Kolab User in the Web Admin Panel. I manually entered localhost as mailhost.
When logging in in Roundcube with this new user an error message says, that this new user has no mailbox.

He cannot send mails:
SMTP Fehler: [554] 5.7.1 <DATA>: Data command rejected: Unverifiable sender.

And nobody can send him mails:
Recipient address rejected: User unknown in local recipient table)

What went wrong and how can it be restored to normal?

Thanx for any help,
JP