diff --git a/AscNet.GameServer/Handlers/AccountModule.cs b/AscNet.GameServer/Handlers/AccountModule.cs
index 816e9cc..3e1695b 100644
--- a/AscNet.GameServer/Handlers/AccountModule.cs
+++ b/AscNet.GameServer/Handlers/AccountModule.cs
@@ -133,13 +133,14 @@ namespace AscNet.GameServer.Handlers
             }, packet.Id);
         }
 
-        /* TODO
+        /* TODO Reconnection state resumption?
         [RequestPacketHandler("ReconnectAck")]
         public static void ReconnectAckHandler(Session session, Packet.Request packet)
         {
         }
         */
 
+        // TODO: Promo code
         [RequestPacketHandler("UseCdKeyRequest")]
         public static void UseCdKeyRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/BossModule.cs b/AscNet.GameServer/Handlers/BossModule.cs
index 14b6864..bc13066 100644
--- a/AscNet.GameServer/Handlers/BossModule.cs
+++ b/AscNet.GameServer/Handlers/BossModule.cs
@@ -31,12 +31,14 @@ namespace AscNet.GameServer.Handlers
 
     internal class BossModule
     {
+        // TODO: Pain Cage entry
         [RequestPacketHandler("BossSingleRankInfoRequest")]
         public static void BossSingleRankInfoRequestHandler(Session session, Packet.Request packet)
         {
             session.SendResponse(new BossSingleRankInfoResponse() { Code = 1 }, packet.Id);
         }
 
+        // TODO: Co-op entry
         [RequestPacketHandler("GetActivityBossDataRequest")]
         public static void GetActivityBossDataRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/CoopModule.cs b/AscNet.GameServer/Handlers/CoopModule.cs
index 0a6bd49..feac361 100644
--- a/AscNet.GameServer/Handlers/CoopModule.cs
+++ b/AscNet.GameServer/Handlers/CoopModule.cs
@@ -35,12 +35,14 @@ namespace AscNet.GameServer.Handlers
 
     internal class CoopModule
     {
+        // TODO: Co-op room creation
         [RequestPacketHandler("CreateRoomRequest")]
         public static void CreateRoomRequestHandler(Session session, Packet.Request packet)
         {
             session.SendResponse(new CreateRoomResponse() { Code = 1 }, packet.Id);
         }
 
+        // TODO: Co-op room matchmaking
         [RequestPacketHandler("MatchRoomRequest")]
         public static void MatchRoomRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/DormModule.cs b/AscNet.GameServer/Handlers/DormModule.cs
index ede5ecb..b919e70 100644
--- a/AscNet.GameServer/Handlers/DormModule.cs
+++ b/AscNet.GameServer/Handlers/DormModule.cs
@@ -31,12 +31,14 @@ namespace AscNet.GameServer.Handlers
 
     internal class DormModule
     {
+        // TODO: Dorm entry
         [RequestPacketHandler("DormEnterRequest")]
         public static void DormEnterRequestHandler(Session session, Packet.Request packet)
         {
             session.SendResponse(new DormEnterResponse(), packet.Id);
         }
         
+        // TODO: Dorm list (called from Details section within account info menu)
         [RequestPacketHandler("DormitoryListRequest")]
         public static void DormitoryListRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/EquipModule.cs b/AscNet.GameServer/Handlers/EquipModule.cs
index 4813cda..5f59e54 100644
--- a/AscNet.GameServer/Handlers/EquipModule.cs
+++ b/AscNet.GameServer/Handlers/EquipModule.cs
@@ -346,6 +346,7 @@ namespace AscNet.GameServer.Handlers
             session.SendResponse(new EquipResonanceResponse() { ResonanceData = resonance }, packet.Id);
         }
 
+        // TODO: Equipment scrapping
         [RequestPacketHandler("EquipDecomposeRequest")]
         public static void EquipDecomposeRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/GuildModule.cs b/AscNet.GameServer/Handlers/GuildModule.cs
index def9162..2a689a9 100644
--- a/AscNet.GameServer/Handlers/GuildModule.cs
+++ b/AscNet.GameServer/Handlers/GuildModule.cs
@@ -22,6 +22,7 @@ namespace AscNet.GameServer.Handlers
 
     internal class GuildModule
     {
+        // TODO: Guild listing
         [RequestPacketHandler("GuildListRecommendRequest")]
         public static void GuildListRecommendRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/ItemModule.cs b/AscNet.GameServer/Handlers/ItemModule.cs
index 86ba7a4..8cb9e8d 100644
--- a/AscNet.GameServer/Handlers/ItemModule.cs
+++ b/AscNet.GameServer/Handlers/ItemModule.cs
@@ -40,6 +40,7 @@ namespace AscNet.GameServer.Handlers
             }, packet.Id);
         }
         
+        // TODO: Consumable item usage
         [RequestPacketHandler("ItemUseRequest")]
         public static void ItemUseRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/MailModule.cs b/AscNet.GameServer/Handlers/MailModule.cs
index 1ee8bfe..198bb2d 100644
--- a/AscNet.GameServer/Handlers/MailModule.cs
+++ b/AscNet.GameServer/Handlers/MailModule.cs
@@ -4,26 +4,45 @@ namespace AscNet.GameServer.Handlers
 {
     #region MsgPackScheme
 #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
+    [MessagePackObject(true)]
+    public class MailReadRequest
+    {
+        public string Id;
+    }
+
     [MessagePackObject(true)]
     public class MailReadResponse
     {
         public int Code;
     }
+
+    [MessagePackObject(true)]
+    public class MailDeleteRequest
+    {
+    }
     
     [MessagePackObject(true)]
-    public class MailReadRequest
+    public class MailDeleteResponse
     {
-        public string Id;
+        public int Code;
     }
 #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
     #endregion
 
     internal class MailModule
     {
+        // TODO: Read mail
         [RequestPacketHandler("MailReadRequest")]
         public static void MailReadRequestHandler(Session session, Packet.Request packet)
         {
             session.SendResponse(new MailReadResponse(), packet.Id);
         }
+
+        // TODO: Delete mail
+        [RequestPacketHandler("MailDeleteRequest")]
+        public static void MailDeleteRequestHandler(Session session, Packet.Request packet)
+        {
+            session.SendResponse(new MailDeleteResponse(), packet.Id);
+        }
     }
 }
diff --git a/AscNet.GameServer/Handlers/PartnerModule.cs b/AscNet.GameServer/Handlers/PartnerModule.cs
index e9579d1..d3596f0 100644
--- a/AscNet.GameServer/Handlers/PartnerModule.cs
+++ b/AscNet.GameServer/Handlers/PartnerModule.cs
@@ -22,6 +22,7 @@ namespace AscNet.GameServer.Handlers
 
     internal class PartnerModule
     {
+        // TODO: CUB combining
         [RequestPacketHandler("PartnerComposeRequest")]
         public static void PartnerComposeRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/PlayerModule.cs b/AscNet.GameServer/Handlers/PlayerModule.cs
index 372b066..e21de6b 100644
--- a/AscNet.GameServer/Handlers/PlayerModule.cs
+++ b/AscNet.GameServer/Handlers/PlayerModule.cs
@@ -261,12 +261,14 @@ namespace AscNet.GameServer.Handlers
             session.SendResponse(new SetDisplayCharIdFirstResponse() { DisplayCharIdList = session.player.PlayerData.DisplayCharIdList }, packet.Id);
         }
 
+        // TODO: "Display Preview" button in Details section of account info menu
         [RequestPacketHandler("QueryPlayerDetailRequest")]
         public static void QueryPlayerDetailRequestHandler(Session session, Packet.Request packet)
         {
             session.SendResponse(new QueryPlayerDetailResponse() { Code = 1 }, packet.Id);
         }
-        
+
+        // TODO: "Save" button in Details section of account info menu
         [RequestPacketHandler("SetAppearanceRequest")]
         public static void SetAppearanceRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/ShopModule.cs b/AscNet.GameServer/Handlers/ShopModule.cs
index c857e88..a8216f4 100644
--- a/AscNet.GameServer/Handlers/ShopModule.cs
+++ b/AscNet.GameServer/Handlers/ShopModule.cs
@@ -45,6 +45,7 @@ namespace AscNet.GameServer.Handlers
             session.SendResponse(rsp, packet.Id);
         }
         
+        // TODO: Dorm shop
         [RequestPacketHandler("GetShopBaseInfoRequest")]
         public static void GetShopBaseInfoRequestHandler(Session session, Packet.Request packet)
         {
diff --git a/AscNet.GameServer/Handlers/TaskModule.cs b/AscNet.GameServer/Handlers/TaskModule.cs
index a47fe2f..73eb607 100644
--- a/AscNet.GameServer/Handlers/TaskModule.cs
+++ b/AscNet.GameServer/Handlers/TaskModule.cs
@@ -27,7 +27,8 @@ namespace AscNet.GameServer.Handlers
         {
             session.SendResponse(new DoClientTaskEventResponse(), packet.Id);
         }
-        
+
+        // TODO: Reward acquisition from course reward line in Tasks menu
         [RequestPacketHandler("GetCourseRewardRequest")]
         public static void GetCourseRewardRequestHandler(Session session, Packet.Request packet)
         {