Prevent massive amount of mails being send.

Added new config: mails-per-minute, default 1000

Essentials/src/com/earth2me/essentials/ISettings.java

@@ -179,4 +179,6 @@ public interface ISettings extends IConf
 	double getMaxFlySpeed();
 
 	double getMaxWalkSpeed();
+
+	public int getMailsPerMinute();
 }

Essentials/src/com/earth2me/essentials/Settings.java

@@ -439,6 +439,7 @@ public class Settings implements ISettings
 		chatRadius = _getChatRadius();
 		commandCosts = _getCommandCosts();
 		warnOnBuildDisallow = _warnOnBuildDisallow();
+		mailsPerMinute = _getMailsPerMinute();
 	}
 	private List<Integer> itemSpawnBl = new ArrayList<Integer>();
 
@@ -936,4 +937,15 @@ public class Settings implements ISettings
 		double maxSpeed = config.getDouble("max-walk-speed", 0.8);
 		return maxSpeed > 1.0 ? 1.0 : Math.abs(maxSpeed);
 	}
+	
+	private int mailsPerMinute;
+
+	private int _getMailsPerMinute() {
+		return config.getInt("mails-per-minute", 1000);
+	}
+	@Override
+	public int getMailsPerMinute()
+	{
+		return mailsPerMinute;
+	}
 }

Essentials/src/com/earth2me/essentials/commands/Commandmail.java

@@ -11,6 +11,9 @@ import org.bukkit.entity.Player;
 
 public class Commandmail extends EssentialsCommand
 {
+	private static int mailsPerMinute = 0;
+	private static long timestamp = 0;
+
 	public Commandmail()
 	{
 		super("mail");
@@ -58,8 +61,22 @@ public class Commandmail extends EssentialsCommand
 			}
 			if (!u.isIgnoredPlayer(user))
 			{
-				final String mail = Util.sanitizeString(Util.stripFormat(getFinalArg(args, 2)));
+				final String mail = user.getName() + ": " + Util.sanitizeString(Util.stripFormat(getFinalArg(args, 2)));
-				u.addMail(user.getName() + ": " + mail);
+				if (mail.length() > 1000)
+				{
+					throw new Exception("Mail message too long. Try to keep it below 1000");
+				}
+				if (Math.abs(System.currentTimeMillis() - timestamp) > 60000)
+				{
+					timestamp = System.currentTimeMillis();
+					mailsPerMinute = 0;
+				}
+				mailsPerMinute++;
+				if (mailsPerMinute > ess.getSettings().getMailsPerMinute())
+				{
+					throw new Exception("Too many mails have been send within the last minute. Maximum: " + ess.getSettings().getMailsPerMinute());
+				}
+				u.addMail(mail);
 			}
 			user.sendMessage(_("mailSent"));
 			return;

Essentials/src/config.yml

@@ -315,6 +315,9 @@ login-attack-delay: 5
 #Set the max fly speed, values range from 0.1 to 1.0
 max-fly-speed: 0.8
 
+#Set the maximum amount of mails that can be send within a minute.
+mails-per-minute: 1000
+
 ############################################################
 # +------------------------------------------------------+ #
 # |                   EssentialsHome                     | #