config_directory = .
db = memcache
foo_domain = bar
header_checks = ldap:hh
hh_domain = whatever
yy = aap
zz_domain = whatever
./postconf: warning: ./main.cf: unused parameter: zz=$yy
./postconf: warning: ./main.cf: unused parameter: aa_domain=whatever
./postconf: warning: ./main.cf: unused parameter: xx=proxy:ldap:foo