cyrus - прием почты и пользователи

На сервере стоит Postfix + Cyrus + SASL.
Если отправлять почту с сервера, то она доходит. Но если отправить НА сервер, то...

допустим, я отправляю на

. по идее она и должна прийти пользователю someuser, но нет - в логи пишется следущее:

Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/pickup[20958]: 917475121AF: uid=1000 from=<adminuser>
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/cleanup[21009]: 917475121AF: message-id=<20100706234549.917475121AF@sds.fastvps.ru>
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/qmgr[20534]: 917475121AF: from=<adminuser@domain.name>, size=2804, nrcpt=1 (queue active)
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/master[21013]: about to exec /usr/lib/cyrus/bin/lmtpd
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: executed
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: accepted connection
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: lmtp connection preauth'd as postman
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: verify_user(user.adminuser) failed: Mailbox does not exist
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/lmtp[21012]: 917475121AF: to=<adminuser@domain.name>, orig_to=<adminuser>, relay=sds.fastvps.ru[/var/run/cyrus/socket/lmtp], delay=48, delays=48/0.01/0.01/0.01, dsn=5.1.1, status=bounced (host sds.fastvps.ru[/var/run/cyrus/socket/lmtp] said: 550-Mailbox unknown.  Either there is no mailbox associated with this 550-name or you do not have authorization to see it. 550 5.1.1 User unknown (in reply to RCPT TO command))
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/cleanup[21009]: 9C9355121B0: message-id=<20100706234549.9C9355121B0@sds.fastvps.ru>
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/bounce[21014]: 917475121AF: sender non-delivery notification: 9C9355121B0
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/qmgr[20534]: 9C9355121B0: from=<>, size=4912, nrcpt=1 (queue active)
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/qmgr[20534]: 917475121AF: removed
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: accepted connection
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: lmtp connection preauth'd as postman
Jul  7 01:45:49 Debian-50-lenny-32-minimal cyrus/lmtpunix[21013]: verify_user(user.adminuser) failed: Mailbox does not exist
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/lmtp[21012]: 9C9355121B0: to=<adminuser@domain.name>, relay=sds.fastvps.ru[/var/run/cyrus/socket/lmtp], delay=0.02, delays=0.01/0/0/0.01, dsn=5.1.1, status=bounced (host sds.fastvps.ru[/var/run/cyrus/socket/lmtp] said: 550-Mailbox unknown.  Either there is no mailbox associated with this 550-name or you do not have authorization to see it. 550 5.1.1 User unknown (in reply to RCPT TO command))
Jul  7 01:45:49 Debian-50-lenny-32-minimal postfix/qmgr[20534]: 9C9355121B0: removed

adminuser - моя учетная запись на сервере, а почта отправлялась на someuser@domain.name. никакие почтовые ящики для adminuser не созданы и, естественно, ошибка.

в чем может быть проблема?

main.cf:

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, localhost.$mydomain, localhost
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = ipv4
mailbox_transport = lmtp:unix:/var/run/cyrus/socket/lmtp
virtual_transport = lmtp:unix:/var/run/cyrus/socket/lmtp
local_recipient_maps =

# sasl
smtpd_sasl_local_domain =
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_authenticated_header = yes
smtpd_sasl_application_name = smtpd