Allow delivery to existing accounts only with LDAP and static

Hi,

we are using LDAP binding as a passdb, and static with allow_all_users=yes as an userdb.

Works fine, but problem is, Maildirs are created for non-existent accounts too. We would like to prevent it.

The LDAP binding does not supporta user lookups. Is the correct way to use checkpassword as a passdb before LDAP, check for account existency here and:

result_success=continue result_failure=return-fail

?

Thank you, regards, Miloslav