diff --git a/proto/ChangeMailStarNotify.proto b/proto/ChangeMailStarNotify.proto
new file mode 100644
index 0000000..05e5b22
--- /dev/null
+++ b/proto/ChangeMailStarNotify.proto
@@ -0,0 +1,8 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message ChangeMailStarNotify {
+  repeated uint32 mailIdList = 1;
+  bool isStar = 2;
+}
diff --git a/proto/DelMailReq.proto b/proto/DelMailReq.proto
new file mode 100644
index 0000000..5f07ac0
--- /dev/null
+++ b/proto/DelMailReq.proto
@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message DelMailReq {
+  repeated uint32 mailIdList = 1;
+}
diff --git a/proto/DelMailRsp.proto b/proto/DelMailRsp.proto
new file mode 100644
index 0000000..2fd5a7b
--- /dev/null
+++ b/proto/DelMailRsp.proto
@@ -0,0 +1,8 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message DelMailRsp {
+  int32 retcode = 1;
+  repeated uint32 mailIdList = 2;
+}
diff --git a/proto/EquipParam.proto b/proto/EquipParam.proto
new file mode 100644
index 0000000..047ce4b
--- /dev/null
+++ b/proto/EquipParam.proto
@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message EquipParam {
+  uint32 itemId = 1;
+  uint32 itemNum = 2;
+  uint32 itemLevel = 3;
+  uint32 PromoteLevel = 4;
+}
diff --git a/proto/GetAllMailReq.proto b/proto/GetAllMailReq.proto
new file mode 100644
index 0000000..d116e09
--- /dev/null
+++ b/proto/GetAllMailReq.proto
@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message GetAllMailReq {
+  bool isGiftMail = 1;
+}
diff --git a/proto/GetAllMailRsp.proto b/proto/GetAllMailRsp.proto
new file mode 100644
index 0000000..6c7d7f3
--- /dev/null
+++ b/proto/GetAllMailRsp.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+import "MailData.proto";
+
+message GetAllMailRsp {
+  int32 retcode = 1;
+  repeated MailData mailList = 2;
+  bool isTruncated = 3;
+}
diff --git a/proto/GetMailItemReq.proto b/proto/GetMailItemReq.proto
new file mode 100644
index 0000000..df20fdc
--- /dev/null
+++ b/proto/GetMailItemReq.proto
@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message GetMailItemReq {
+  repeated uint32 mailIdList = 1;
+}
diff --git a/proto/GetMailItemRsp.proto b/proto/GetMailItemRsp.proto
new file mode 100644
index 0000000..4eb3017
--- /dev/null
+++ b/proto/GetMailItemRsp.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+import "EquipParam.proto";
+
+message GetMailItemRsp {
+  int32 retcode = 1;
+  repeated uint32 mailIdList = 2;
+  repeated EquipParam itemList = 3;
+}
diff --git a/proto/MailChangeNotify.proto b/proto/MailChangeNotify.proto
new file mode 100644
index 0000000..0fe80b2
--- /dev/null
+++ b/proto/MailChangeNotify.proto
@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+import "MailData.proto";
+
+message MailChangeNotify {
+  repeated MailData mailList = 1;
+  repeated uint32 delMailIdList = 2;
+}
diff --git a/proto/MailData.proto b/proto/MailData.proto
new file mode 100644
index 0000000..fe74217
--- /dev/null
+++ b/proto/MailData.proto
@@ -0,0 +1,20 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+import "MailTextContent.proto";
+import "MailItem.proto";
+
+message MailData {
+  uint32 mailId = 1;
+  MailTextContent mailTextContent = 4;
+  repeated MailItem itemList = 7;
+  uint32 sendTime = 8;
+  uint32 expireTime = 9;
+  uint32 importance = 10;
+  bool isRead = 11;
+  bool isAttachmentGot = 12;
+  uint32 configId = 13;
+  repeated string argumentList = 14;
+  uint32 stateValue = 15;
+}
diff --git a/proto/MailItem.proto b/proto/MailItem.proto
new file mode 100644
index 0000000..72bcb8e
--- /dev/null
+++ b/proto/MailItem.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+import "ItemParam.proto";
+import "MaterialDeleteInfo.proto";
+
+message MailItem {
+  ItemParam itemParam = 1;
+  MaterialDeleteInfo deleteInfo = 2;
+}
diff --git a/proto/MailTextContent.proto b/proto/MailTextContent.proto
new file mode 100644
index 0000000..097710f
--- /dev/null
+++ b/proto/MailTextContent.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message MailTextContent {
+  string title = 1;
+  string content = 2;
+  string sender = 3;
+}
diff --git a/proto/ReadMailNotify.proto b/proto/ReadMailNotify.proto
new file mode 100644
index 0000000..d48c0d5
--- /dev/null
+++ b/proto/ReadMailNotify.proto
@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message ReadMailNotify {
+  repeated uint32 mailIdList = 1;
+}