| Whether the [[#Target player|specified player(s)]] have the given [[Modding:Mail data|mail flag]] set (with spaces allowed in the {{t|id}}).
+
| Whether the [[#Target player|specified player(s)]] have the given [[Modding:Mail data|mail flag]] set (with spaces allowed in the {{t|id}}). This checks the mailbox, tomorrow's mail, and mail received.