Messages relating to in-game activities are sent and stored in the inbox.No limits of messages can be stored at any time. Events that generate a message in the inbox are:

• Getting attacked in PVP or Clan Wars
• Weapons/Parts Auction Transactions
• Resource Auction Transactions
• Receiving a prize for defeating an event monster
• Crew updates
• Clan promotions (ie Retainer » Champion, etc)
• Inner-clan private messages

Combat replays are accessed through the inbox.