On a Postfix mail server, the command postconf -m is run to determine if OpenLDAP is supported. Which storage medium would indicate support for OpenLDAP?

The `ldap` storage medium type listed by `postconf -m` signifies that Postfix has been compiled with support for LDAP lookups, which is used for OpenLDAP integration to query directory services.

`openldap` is the name of the software suite, not the specific storage medium type reported by Postfix for LDAP support.

`x500` is a directory services standard, but it is not the Postfix storage medium identifier used for LDAP lookups.

`dbm` refers to a generic database management system for flat-file databases, not specifically for LDAP directory lookups.

`ldaptable` is not a standard Postfix storage medium type for indicating LDAP support.