diff --git a/meshchat.py b/meshchat.py
index d574dda..7a741f2 100644
--- a/meshchat.py
+++ b/meshchat.py
@@ -126,8 +126,13 @@ class ReticulumMeshChat:
         self.local_lxmf_destination = self.message_router.register_delivery_identity(
             identity=self.identity,
             display_name=self.config.display_name.get(),
+            stamp_cost=self.config.lxmf_inbound_stamp_cost.get(),
         )
 
+        # drop inbound messages without a valid stamp if enforcement is enabled
+        if self.config.lxmf_enforce_inbound_stamp_cost.get():
+            self.message_router.enforce_stamps()
+
         # set a callback for when an lxmf message is received
         self.message_router.register_delivery_callback(self.on_lxmf_delivery)
 
@@ -2133,6 +2138,20 @@ class ReticulumMeshChat:
             value = bool(data["show_suggested_community_interfaces"])
             self.config.show_suggested_community_interfaces.set(value)
 
+        if "lxmf_inbound_stamp_cost" in data:
+            value = int(data["lxmf_inbound_stamp_cost"])
+            if 0 <= value <= 254:
+                self.config.lxmf_inbound_stamp_cost.set(value)
+                self.message_router.set_inbound_stamp_cost(self.local_lxmf_destination.hash, value)
+
+        if "lxmf_enforce_inbound_stamp_cost" in data:
+            value = bool(data["lxmf_enforce_inbound_stamp_cost"])
+            self.config.lxmf_enforce_inbound_stamp_cost.set(value)
+            if value:
+                self.message_router.enforce_stamps()
+            else:
+                self.message_router.ignore_stamps()
+
         if "lxmf_preferred_propagation_node_destination_hash" in data:
 
             # update config value
@@ -2388,6 +2407,8 @@ class ReticulumMeshChat:
             "allow_auto_resending_failed_messages_with_attachments": self.config.allow_auto_resending_failed_messages_with_attachments.get(),
             "auto_send_failed_messages_to_propagation_node": self.config.auto_send_failed_messages_to_propagation_node.get(),
             "show_suggested_community_interfaces": self.config.show_suggested_community_interfaces.get(),
+            "lxmf_inbound_stamp_cost": self.config.lxmf_inbound_stamp_cost.get(),
+            "lxmf_enforce_inbound_stamp_cost": self.config.lxmf_enforce_inbound_stamp_cost.get(),
             "lxmf_local_propagation_node_enabled": self.config.lxmf_local_propagation_node_enabled.get(),
             "lxmf_local_propagation_node_address_hash": self.message_router.propagation_destination.hexhash,
             "lxmf_preferred_propagation_node_destination_hash": self.config.lxmf_preferred_propagation_node_destination_hash.get(),
@@ -3410,6 +3431,8 @@ class Config:
     auto_send_failed_messages_to_propagation_node = BoolConfig("auto_send_failed_messages_to_propagation_node", False)
     show_suggested_community_interfaces = BoolConfig("show_suggested_community_interfaces", True)
     lxmf_delivery_transfer_limit_in_bytes = IntConfig("lxmf_delivery_transfer_limit_in_bytes", 1000 * 1000 * 10)  # 10MB
+    lxmf_inbound_stamp_cost = IntConfig("lxmf_inbound_stamp_cost", 0)  # 0 = disabled, valid range 1-254
+    lxmf_enforce_inbound_stamp_cost = BoolConfig("lxmf_enforce_inbound_stamp_cost", False)
     lxmf_preferred_propagation_node_destination_hash = StringConfig("lxmf_preferred_propagation_node_destination_hash", None)
     lxmf_preferred_propagation_node_auto_sync_interval_seconds = IntConfig("lxmf_preferred_propagation_node_auto_sync_interval_seconds", 0)
     lxmf_preferred_propagation_node_last_synced_at = IntConfig("lxmf_preferred_propagation_node_last_synced_at", None)
diff --git a/src/frontend/components/settings/SettingsPage.vue b/src/frontend/components/settings/SettingsPage.vue
index 5b21634..4be8c85 100644
--- a/src/frontend/components/settings/SettingsPage.vue
+++ b/src/frontend/components/settings/SettingsPage.vue
@@ -91,6 +91,22 @@
                         <div class="text-sm text-gray-700 dark:text-gray-300">When enabled, messages that fail to send will be sent to the configured propagation node.</div>
                     </div>
 
+                    <div class="p-2">
+                        <label class="text-sm font-medium text-gray-900 dark:text-gray-100">Inbound Stamp Cost</label>
+                        <input v-model="config.lxmf_inbound_stamp_cost" @change="onLxmfInboundStampCostChange" type="number" min="0" max="254" class="bg-gray-50 dark:bg-zinc-700 border border-gray-300 dark:border-zinc-600 text-gray-900 dark:text-gray-100 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 dark:focus:ring-blue-600 dark:focus:border-blue-600 block w-full p-2.5 mt-1">
+                        <div class="text-sm text-gray-700 dark:text-gray-300">Senders must attach a proof of work stamp of this difficulty to message you, which deters automated spam. 0 disables it. Higher values take senders longer to compute. Peers learn your cost from your next announce.</div>
+                    </div>
+
+                    <div class="p-2">
+                        <div class="flex items-start">
+                            <div class="flex items-center h-5">
+                                <input v-model="config.lxmf_enforce_inbound_stamp_cost" @change="onLxmfEnforceInboundStampCostChange" type="checkbox" class="w-4 h-4 border border-gray-300 dark:border-zinc-600 rounded bg-gray-50 dark:bg-zinc-700 focus:ring-3 focus:ring-blue-300 dark:focus:ring-blue-600">
+                            </div>
+                            <label class="ml-2 text-sm font-medium text-gray-900 dark:text-gray-100">Require valid stamps</label>
+                        </div>
+                        <div class="text-sm text-gray-700 dark:text-gray-300">When enabled, messages without a valid stamp will be dropped. When disabled, your stamp cost is advertised but unstamped messages are still delivered.</div>
+                    </div>
+
                 </div>
             </div>
 
@@ -242,6 +258,16 @@ export default {
                 "allow_auto_resending_failed_messages_with_attachments": this.config.allow_auto_resending_failed_messages_with_attachments,
             });
         },
+        async onLxmfInboundStampCostChange() {
+            await this.updateConfig({
+                "lxmf_inbound_stamp_cost": this.config.lxmf_inbound_stamp_cost,
+            });
+        },
+        async onLxmfEnforceInboundStampCostChange() {
+            await this.updateConfig({
+                "lxmf_enforce_inbound_stamp_cost": this.config.lxmf_enforce_inbound_stamp_cost,
+            });
+        },
         async onAutoSendFailedMessagesToPropagationNodeChange() {
             await this.updateConfig({
                 "auto_send_failed_messages_to_propagation_node": this.config.auto_send_failed_messages_to_propagation_node,