#960 Send message to player if email could not be sent

src/main/java/fr/xephi/authme/message/MessageFileHandler.java

@@ -53,7 +53,7 @@ public class MessageFileHandler {
 
         if (message == null) {
             ConsoleLogger.warning("Error getting message with key '" + key + "'. "
-                + "Please verify your config file at '" + filename + "'");
+                + "Please update your config file '" + filename + "' (or run /authme messages)");
             return getDefault(key);
         }
         return message;

src/main/java/fr/xephi/authme/message/MessageKey.java

@@ -153,6 +153,8 @@ public enum MessageKey {
 
     INCOMPLETE_EMAIL_SETTINGS("incomplete_email_settings"),
 
+    EMAIL_SEND_FAILURE("email_send_failure"),
+
     RECOVERY_CODE_SENT("recovery_code_sent"),
 
     INCORRECT_RECOVERY_CODE("recovery_code_incorrect");