diff --git a/mirai-core/src/commonMain/kotlin/contact/AbstractUser.kt b/mirai-core/src/commonMain/kotlin/contact/AbstractUser.kt
index 37e35bb2c..580bb3991 100644
--- a/mirai-core/src/commonMain/kotlin/contact/AbstractUser.kt
+++ b/mirai-core/src/commonMain/kotlin/contact/AbstractUser.kt
@@ -18,7 +18,7 @@ import net.mamoe.mirai.event.broadcast
 import net.mamoe.mirai.event.events.*
 import net.mamoe.mirai.internal.QQAndroidBot
 import net.mamoe.mirai.internal.message.contextualBugReportException
-import net.mamoe.mirai.internal.message.flags.MiraiInternalMessageFlag
+import net.mamoe.mirai.internal.message.flags.SkipEventBroadcast
 import net.mamoe.mirai.internal.message.image.*
 import net.mamoe.mirai.internal.message.protocol.MessageProtocolFacade
 import net.mamoe.mirai.internal.message.protocol.outgoing.HighwayUploader
@@ -252,13 +252,13 @@ internal suspend fun <C : AbstractContact> C.sendMessageImpl(
     preSendEventConstructor: (C, Message) -> MessagePreSendEvent,
     postSendEventConstructor: (C, MessageChain, Throwable?, MessageReceipt<C>?) -> MessagePostSendEvent<C>,
 ): MessageReceipt<C> {
-    val isMiraiInternal = if (message is MessageChain) {
-        message.anyIsInstance<MiraiInternalMessageFlag>()
+    val skipEvent = if (message is MessageChain) {
+        message.anyIsInstance<SkipEventBroadcast>()
     } else false
 
     require(!message.isContentEmpty()) { "message is empty" }
 
-    val chain = broadcastMessagePreSendEvent(message, isMiraiInternal, preSendEventConstructor)
+    val chain = broadcastMessagePreSendEvent(message, skipEvent, preSendEventConstructor)
 
     val result = kotlin.runCatching {
         MessageProtocolFacade.preprocessAndSendOutgoing(this, message, buildComponentStorage {
@@ -273,7 +273,7 @@ internal suspend fun <C : AbstractContact> C.sendMessageImpl(
         bot.logger.verbose("$this <- $chain".replaceMagicCodes())
     }
 
-    if (!isMiraiInternal) {
+    if (!skipEvent) {
         postSendEventConstructor(this, chain, result.exceptionOrNull(), result.getOrNull()).broadcast()
     }
 
diff --git a/mirai-core/src/commonMain/kotlin/contact/GroupSendMessageImpl.kt b/mirai-core/src/commonMain/kotlin/contact/GroupSendMessageImpl.kt
index b3c534546..bb51bb18d 100644
--- a/mirai-core/src/commonMain/kotlin/contact/GroupSendMessageImpl.kt
+++ b/mirai-core/src/commonMain/kotlin/contact/GroupSendMessageImpl.kt
@@ -24,10 +24,10 @@ import net.mamoe.mirai.message.data.toMessageChain
  */
 internal suspend fun <C : Contact> C.broadcastMessagePreSendEvent(
     message: Message,
-    isMiraiInternal: Boolean,
+    skipEvent: Boolean,
     eventConstructor: (C, Message) -> MessagePreSendEvent,
 ): MessageChain {
-    if (isMiraiInternal) return message.toMessageChain()
+    if (skipEvent) return message.toMessageChain()
     var eventName: String? = null
     return kotlin.runCatching {
         eventConstructor(this, message).also {
diff --git a/mirai-core/src/commonMain/kotlin/message/flags/InternalFlagOnlyMessage.kt b/mirai-core/src/commonMain/kotlin/message/flags/InternalFlagOnlyMessage.kt
index d5c399056..d333fc302 100644
--- a/mirai-core/src/commonMain/kotlin/message/flags/InternalFlagOnlyMessage.kt
+++ b/mirai-core/src/commonMain/kotlin/message/flags/InternalFlagOnlyMessage.kt
@@ -11,6 +11,7 @@
 
 package net.mamoe.mirai.internal.message.flags
 
+import net.mamoe.mirai.contact.Contact
 import net.mamoe.mirai.internal.message.visitor.ex
 import net.mamoe.mirai.message.data.*
 import net.mamoe.mirai.message.data.visitor.MessageVisitor
@@ -79,25 +80,28 @@ internal object IgnoreLengthCheck : MessageMetadata, ConstrainSingle, InternalFl
 }
 
 /**
- * 代表来自 mirai 内部
+ * Skip broadcasting events. Used for [Contact.sendMessage]
  */
-internal object MiraiInternalMessageFlag : MessageMetadata, ConstrainSingle, InternalFlagOnlyMessage,
-    AbstractMessageKey<MiraiInternalMessageFlag>({ it.safeCast() }) {
-    override val key: MessageKey<MiraiInternalMessageFlag> get() = this
-    override fun toString(): String = ""
+internal sealed interface SkipEventBroadcast : MessageMetadata, ConstrainSingle, InternalFlagOnlyMessage {
+    override val key: MessageKey<SkipEventBroadcast> get() = Companion
 
     override fun <D, R> accept(visitor: MessageVisitor<D, R>, data: D): R {
-        return visitor.ex()?.visitMiraiInternalMessageFlag(this, data) ?: super<InternalFlagOnlyMessage>.accept(
+        return visitor.ex()?.visitSkipEventBroadcast(this, data) ?: super<InternalFlagOnlyMessage>.accept(
             visitor,
             data
         )
     }
+
+    companion object : AbstractMessageKey<SkipEventBroadcast>({ it.safeCast() }), SkipEventBroadcast {
+        // instance
+
+        override fun toString(): String = ""
+    }
 }
 
-internal object AllowSendFileMessage : MessageMetadata, ConstrainSingle, InternalFlagOnlyMessage,
-    AbstractMessageKey<AllowSendFileMessage>({ it.safeCast() }) {
-    override val key: MessageKey<AllowSendFileMessage> get() = this
-    override fun toString(): String = ""
+internal sealed interface AllowSendFileMessage : MessageMetadata, ConstrainSingle, InternalFlagOnlyMessage,
+    SkipEventBroadcast {
+    override val key: MessageKey<AllowSendFileMessage> get() = Companion
 
     override fun <D, R> accept(visitor: MessageVisitor<D, R>, data: D): R {
         return visitor.ex()?.visitAllowSendFileMessage(this, data) ?: super<InternalFlagOnlyMessage>.accept(
@@ -105,4 +109,8 @@ internal object AllowSendFileMessage : MessageMetadata, ConstrainSingle, Interna
             data
         )
     }
+
+    companion object : AbstractMessageKey<AllowSendFileMessage>({ it.safeCast() }), AllowSendFileMessage {
+        override fun toString(): String = ""
+    }
 }
\ No newline at end of file
diff --git a/mirai-core/src/commonMain/kotlin/message/visitor/MessageVisitorEx.kt b/mirai-core/src/commonMain/kotlin/message/visitor/MessageVisitorEx.kt
index 8202510e0..513db8dd6 100644
--- a/mirai-core/src/commonMain/kotlin/message/visitor/MessageVisitorEx.kt
+++ b/mirai-core/src/commonMain/kotlin/message/visitor/MessageVisitorEx.kt
@@ -61,11 +61,11 @@ internal interface MessageVisitorEx<in D, out R> : MessageVisitor<D, R> {
         return visitInternalFlagOnlyMessage(message, data)
     }
 
-    fun visitMiraiInternalMessageFlag(message: MiraiInternalMessageFlag, data: D): R {
+    fun visitSkipEventBroadcast(message: SkipEventBroadcast, data: D): R {
         return visitInternalFlagOnlyMessage(message, data)
     }
 
     fun visitAllowSendFileMessage(message: AllowSendFileMessage, data: D): R {
-        return visitInternalFlagOnlyMessage(message, data)
+        return visitSkipEventBroadcast(message, data)
     }
 }
\ No newline at end of file
diff --git a/mirai-core/src/jvmBaseMain/kotlin/utils/RemoteFileImpl.kt b/mirai-core/src/jvmBaseMain/kotlin/utils/RemoteFileImpl.kt
index 932393f40..f7f76eeab 100644
--- a/mirai-core/src/jvmBaseMain/kotlin/utils/RemoteFileImpl.kt
+++ b/mirai-core/src/jvmBaseMain/kotlin/utils/RemoteFileImpl.kt
@@ -21,7 +21,6 @@ import net.mamoe.mirai.internal.asQQAndroidBot
 import net.mamoe.mirai.internal.contact.groupCode
 import net.mamoe.mirai.internal.message.data.FileMessageImpl
 import net.mamoe.mirai.internal.message.flags.AllowSendFileMessage
-import net.mamoe.mirai.internal.message.flags.MiraiInternalMessageFlag
 import net.mamoe.mirai.internal.network.highway.Highway
 import net.mamoe.mirai.internal.network.highway.ResourceKind
 import net.mamoe.mirai.internal.network.protocol