Ldap, postfix and local recipients alias

Hi

I have my uses in LDAP, setup using yast so that some users have several e-mail addresses (suseMailAcceptAddress). Setup postfix via yast2.
Now when I send mail to a alias e-mail address I get unknown user.

In my postfix main.cf I only have virtual_map_alias setup as yast did. I have not any local_recipient setup.

any good clues?