**x-list-subscriptions**
: List all subscriptions.
-**x-subscribe:** person@example.org 0x12345678DEADBEEF12345678DEADBEEF12345678
-: Subscribe the given address and assign it the given OpenPGP-fingerprint.
+**x-subscribe:** person@example.org 0x12345678DEADBEEF12345678DEADBEEF12345678 false true
+: Subscribe the given email address and assign it the given OpenPGP fingerprint. The last two arguments can be omitted and will default to "false true": do not give the given email address administration permissions and enable email delivery.
**x-unsubscribe:** person@example.org
: Unsubscribe the given address. It is not possible to unsubscribe the last admin of a list.