Server :: Postfix 2.8.2 Rejecting Some Mail With User Unknown?

I have this strange error - I switched from postfix 2.6.5 to 2.8.2 and I some mailservers cannot send mail to me. One of them was some sendmail server. I have virtual alias maps in mysql. It works fine for almost all server that are sending mail to me, but some of them seems to send mails as user@FQDN instead of user@virtualdomain my machine name is x49.tvujweb.cz, and mz email is kamil.horky@servis-it.net but in server logs is that user kamil.horky@x49.tvujweb.cz cannot be found in virtual alias maps.

here is my postconf:

Code:
2bounce_notice_recipient = postmaster
access_map_defer_code = 450
access_map_reject_code = 554
address_verify_cache_cleanup_interval = 12h

[Code]....