Problem with maildrop

Hello! I have a strange problem. Everything works fine until one of my users pointed me to email problem.

Hear is the log:

Sep 13 10:55:25 devplus postfix/smtpd[19899]: warning: restriction `reject_unauth_destination' after `check_relay_domains' is ignored
Sep 13 11:03:33 devplus postfix/pipe[19968]: A9250C984: to=<service@xxx.ru>, relay=maildrop, delay=0.12, delays=0.03/0.01/0/0.07, dsn=5.1.1, status=bounced (user unknown. Command output: ERR: authdaemon: s_connect() failed: Permission denied Invalid user specified. )</service@xxx.ru>

I have used email guide from linode library:

~~[http://library.linode.com/email/postfix/dovecot-mysql-ubuntu-10.10-maverick#sphset-up-mysql-for-virtual-domains-and-users" target="blank">](http://library.linode.com/email/postfix … -and-users">http://library.linode.com/email/postfix/dovecot-mysql-ubuntu-10.10-maverick#sph_set-up-mysql-for-virtual-domains-and-users](

All tables in DataBase are ok. Folders and users are present in the system.

Need help!