+ | MsgSaQuery of string
+ (* Check on the SpamAsssassin filtering status of a user or e-mail address *)
+ | MsgSaStatus of bool
+ (* Response to MsgSaQuery *)
+ | MsgSaSet of string * bool
+ (* Set the filtering status of a user or e-mail address *)
+ | MsgSmtpLogReq of string
+ (* Request all current SMTP log lines about a domain *)
+ | MsgSmtpLogRes of string
+ (* One line of a response to MsgSmtpLogReq *)
+ | MsgDbPasswd of {dbtype : string, passwd : string}
+ (* Change a DBMS user's password *)
+ | MsgShutdown
+ (* Halt the server *)
+ | MsgYes
+ | MsgNo
+ (* Answers to boolean queries *)
+ | MsgQuery of query
+ (* Ask for host-specific information *)
+ | MsgSocket of socket_permission
+ (* Answer to a QSocket query *)
+ | MsgFirewall of string list
+ (* Answer to a QFirewall query *)
+ | MsgRegenerateTc
+ (* MsgRegenerate without actual publishing of configuration *)
+ | MsgGrantDb of {dbtype : string, dbname : string}
+ (* Grant all allowed privileges on a DBMS database to the user *)
+ | MsgMysqlFixperms
+ (* Run the script to grant DROP privileges on MySQL tables to owning users *)
+ | MsgDescribe of string
+ (* 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 *)
+ | MsgAptQuery of {section : string, description : string}
+ (* Answer to QAptExists query *)