[Dovecot] Homedir for sieve/LDAP

[Edgar Fuß]

I'm somewhat confused regarding Home Directories needed by sieve and  
setting them for an LDAP userdb.

We have system users, passdb ldap, userdb ldap, but home directories  
are not mounted on the mail server.

Now apparently, sieve needs the home directory for .dovecot.lda-dupes.

Is there an easier way to give lda/sieve a home directory than  
setting something along the lines of
user_attrs = ...,uid=home=/import/mail/%$/home
in dovecot-ldap.conf?