[Dovecot] No inbox for user error

[Ron]

Hi,
I'm getting 'no inbox for user' error.
Set up sendmail, and can send and receive mail using Webmin/Usermin both
to internal addresses and external ones.
But Dovecot gives the no inbox error.
I've tried telnetting in and get:

+OK dovecot ready.
USER myob
-ERR Unknown command
USER myob
+UK
PASS <password>
+OK Logged in.
-ERR No INBOX for user.

No idea why the first USER command gives an error.

And, of course, when I try using Evolution I get 'Cannot get POP
summary'.

The Dovecot config file, less all the commented out bits is:

imap_listen = [::]
pop3_listen = [::]
imaps_listen = [::]
pop3s_listen = [::]
ssl_cert_file = /etc/pki/dovecot/dovecot.pem
ssl_key_file = /etc/pki/dovecot/private/dovecot.pem
login_dir = /var/run/dovecot-login
login_chroot = yes
login = imap
login_user = dovecot
login = pop3
default_mail_env = 
mbox_locks = fcntl
auth = default
auth_mechanisms = plain
auth_userdb = passwd
auth_passdb = pam
auth_user = root

Any and all ideas very welcome.
I'm a total newbie at this server business...
Thanks in advance.
Ron

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