bueno yo estuve mirando y encontre de donde salia ese mensaje:
ve a la carpeta MANGOS... THELOKOTE 13 FOR 32/64 segun en la que tengas el server... despues abres MANGOSD con el bloc de notas y vajas hasta s SERVER SETTINGS y bajas veras a algo asi:
GameType = 1
RealmZone = 1
Expansion = 2
DBC.Locale = 255
DeclinedNames = 0
StrictPlayerNames = 0
StrictCharterNames = 0
StrictPetNames = 0
MinPlayerName = 2
MinCharterName = 2
MinPetName = 2
CharactersCreatingDisabled = 0
CharactersPerAccount = 50
CharactersPerRealm = 10
HeroicCharactersPerRealm = 10
MinLevelForHeroicCharacterCreating = 55
SkipCinematics = 0
MaxPlayerLevel = 80
StartPlayerLevel = 1
StartHeroicPlayerLevel = 55
StartPlayerMoney = 500
MaxHonorPoints = 200000
StartHonorPoints = 0
MaxArenaPoints = 10000
StartArenaPoints = 0
InstantLogout = 0
DisableWaterBreath = 4
AllFlightPaths = 0
AlwaysMaxSkillForLevel = 0
ActivateWeather = 1
CastUnstuck = 1
MaxSpellCastsInChain = 10
Instance.IgnoreLevel = 0
Instance.IgnoreRaid = 0
Instance.ResetTimeHour = 4
Instance.UnloadDelay = 1800000
Quests.LowLevelHideDiff = 4
Quests.HighLevelHideDiff = 7
Quests.Daily.ResetHour = 6
Quests.Weekly.ResetWeekDay = 3
Quests.Weekly.ResetHour = 6
Guild.EventLogRecordsCount = 100
Guild.BankEventLogRecordsCount = 25
TimerBar.Fatigue.GMLevel = 4
TimerBar.Fatigue.Max = 60
TimerBar.Breath.GMLevel = 4
TimerBar.Breath.Max = 180
TimerBar.Fire.GMLevel = 4
TimerBar.Fire.Max = 1
MaxPrimaryTradeSkill = 2
MinPetitionSigns = 0
MaxGroupXPDistance = 74
MailDeliveryDelay = 3600
SkillChance.Prospecting = 0
SkillChance.Milling = 0
OffhandCheckAtTalentsReset = 0
ClientCacheVersion = 0
Event.Announce = 0
BeepAtStart = 1
WaitAtStartupError = 0
Motd = "bienvenidos al infierno... server wow"!!! have fun."
ahy en donde dice motod = " bien......... de ahi sale el mensaje en el server cambialo por el mensaje que quieras(xd yo ya puse mi mensaje xd)
salu2