(* Ask for a listing of all of a domain's real configuration *)
| MsgDescription of string
(* Reply to MsgDescribe *)
+ | MsgReUsers
+ (* Rerun all callbacks for cases where the set of users has changed *)
+ | MsgVmailChanged
+ (* Server tells slave that vmail user information has changed *)
+ | MsgFirewallRegen
+ (* Regenerate firewall on user machines *)
end