diff --git a/lib/native/client.dart b/lib/native/client.dart
index 6685b74..bdbf589 100644
--- a/lib/native/client.dart
+++ b/lib/native/client.dart
@@ -112,14 +112,14 @@ class FumiNative {
 
   Future<int> rotations() => _io((ffi) => ffi.rotations(_s));
 
-  Future<void> pinServer(String host, String keyB32) =>
-      _io((ffi) => ffi.pinServer(_s, host, keyB32));
+  Future<void> pinServer(String host, String keyB32, int port) =>
+      _io((ffi) => ffi.pinServer(_s, host, keyB32, port));
 
-  Future<String?> serverPin(String host) =>
-      _io((ffi) => ffi.serverPin(_s, host));
+  Future<String?> serverPin(String host, int port) =>
+      _io((ffi) => ffi.serverPin(_s, host, port));
 
-  Future<void> unpinServer(String host) =>
-      _io((ffi) => ffi.unpinServer(_s, host));
+  Future<void> unpinServer(String host, int port) =>
+      _io((ffi) => ffi.unpinServer(_s, host, port));
 
   Future<List<dynamic>> pins() => _io((ffi) => ffi.pins(_s));
 
diff --git a/lib/native/ffi.dart b/lib/native/ffi.dart
index 32a7d69..016943b 100644
--- a/lib/native/ffi.dart
+++ b/lib/native/ffi.dart
@@ -109,15 +109,15 @@ class SmolFfi {
       Void Function(Pointer<Void>),
       void Function(Pointer<Void>)>("smol_flag_free");
 
-  late final int Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>)
+  late final int Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, int)
       _pinServer = _lib.lookupFunction<
-          Int32 Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>),
-          int Function(
-              Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>)>("smol_pin_server");
-  late final Pointer<Utf8> Function(Pointer<Void>, Pointer<Utf8>)
+          Int32 Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, Uint16),
+          int Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>,
+              int)>("smol_pin_server");
+  late final Pointer<Utf8> Function(Pointer<Void>, Pointer<Utf8>, int)
       _serverPin = _lib.lookupFunction<
-              Pointer<Utf8> Function(Pointer<Void>, Pointer<Utf8>),
-              Pointer<Utf8> Function(Pointer<Void>, Pointer<Utf8>)>(
+              Pointer<Utf8> Function(Pointer<Void>, Pointer<Utf8>, Uint16),
+              Pointer<Utf8> Function(Pointer<Void>, Pointer<Utf8>, int)>(
           "smol_server_pin");
   late final Pointer<Utf8> Function(Pointer<Void>) _storeAccount = _lib
       .lookupFunction<Pointer<Utf8> Function(Pointer<Void>),
@@ -226,9 +226,11 @@ class SmolFfi {
               Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, Int32),
           int Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>,
               int)>("smol_contact_save");
-  late final int Function(Pointer<Void>, Pointer<Utf8>) _unpinServer = _lib
-      .lookupFunction<Int32 Function(Pointer<Void>, Pointer<Utf8>),
-          int Function(Pointer<Void>, Pointer<Utf8>)>("smol_unpin_server");
+  late final int Function(Pointer<Void>, Pointer<Utf8>, int) _unpinServer =
+      _lib.lookupFunction<
+          Int32 Function(Pointer<Void>, Pointer<Utf8>, Uint16),
+          int Function(
+              Pointer<Void>, Pointer<Utf8>, int)>("smol_unpin_server");
   late final Pointer<Utf8> Function(Pointer<Void>) _pins = _lib.lookupFunction<
       Pointer<Utf8> Function(Pointer<Void>),
       Pointer<Utf8> Function(Pointer<Void>)>("smol_pins");
@@ -334,12 +336,14 @@ class SmolFfi {
 
   void freeFlag(int flag) => _flagFree(_h(flag));
 
-  void pinServer(int store, String host, String keyB32) {
-    if (_pinServer(_h(store), _text(host), _text(keyB32)) != smolOk) _fail();
+  void pinServer(int store, String host, String keyB32, int port) {
+    if (_pinServer(_h(store), _text(host), _text(keyB32), port) != smolOk) {
+      _fail();
+    }
   }
 
-  void unpinServer(int store, String host) {
-    if (_unpinServer(_h(store), _text(host)) != smolOk) _fail();
+  void unpinServer(int store, String host, int port) {
+    if (_unpinServer(_h(store), _text(host), port) != smolOk) _fail();
   }
 
   /// Every pin: [{host, key}] with keys as base32.
@@ -355,8 +359,8 @@ class SmolFfi {
           _h(store), _text(address), _text(keyB32), verified ? 1 : 0);
 
   /// Null when nothing is pinned.
-  String? serverPin(int store, String host) {
-    final text = take(_serverPin(_h(store), _text(host)));
+  String? serverPin(int store, String host, int port) {
+    final text = take(_serverPin(_h(store), _text(host), port));
     return text.isEmpty ? null : text;
   }
 
diff --git a/lib/presentation/screens/onboarding_screen.dart b/lib/presentation/screens/onboarding_screen.dart
index 75e62dc..cbfea57 100644
--- a/lib/presentation/screens/onboarding_screen.dart
+++ b/lib/presentation/screens/onboarding_screen.dart
@@ -161,7 +161,7 @@ class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
       // "already pinned, e.g. by a previous attempt or a preset server".
       final serverKey = serverKeyController.text.trim();
       if (serverKey.isNotEmpty) {
-        client.pinServer(address.host, serverKey);
+        client.pinServer(address.host, serverKey, address.port);
       }
       if (recall && restoreIntent) {
         await client.restoreAndRecall(seedController.text, address.short);
@@ -210,7 +210,7 @@ class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
                     image: AssetImage("assets/images/bug_logo.png"),
                     fit: BoxFit.contain),
               ),
-              Text("kirakira",
+              Text("キラキラ",
                   style: Theme.of(context).textTheme.titleLarge),
               const SizedBox(height: 40),
               Text(title, style: Theme.of(context).textTheme.titleMedium),
diff --git a/lib/presentation/screens/settings_screen.dart b/lib/presentation/screens/settings_screen.dart
index a9b5746..70a0f6b 100644
--- a/lib/presentation/screens/settings_screen.dart
+++ b/lib/presentation/screens/settings_screen.dart
@@ -12,6 +12,7 @@ import "package:smol_mail/data/providers/providers.dart";
 import "package:smol_mail/presentation/routes/app_router.gr.dart";
 import "package:smol_mail/presentation/theme/app_colors.dart";
 import "package:smol_mail/shared/utils/snackbar.dart";
+import "package:smol_mail/smol/address.dart";
 import "package:smol_mail/smol/errors.dart";
 import "package:smol_mail/smol/ui.dart";
 
@@ -320,7 +321,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
               trailing: IconButton(
                 icon: const Icon(Icons.delete_outline, size: 18),
                 onPressed: () {
-                  store.unpinServer(host);
+                  store.unpinServer(host, defaultPort);
                   ref.read(revisionProvider.notifier).bump();
                   setState(() {});
                 },
@@ -350,9 +351,8 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
           TextButton(
             onPressed: () {
               try {
-                ref
-                    .read(clientProvider)
-                    .pinServer(hostController.text, keyController.text);
+                ref.read(clientProvider).pinServer(
+                    hostController.text, keyController.text, defaultPort);
                 keyController.clear();
                 setState(() {});
               } on SmolError catch (err) {
diff --git a/lib/smol/client.dart b/lib/smol/client.dart
index 1ea6a7a..750435b 100644
--- a/lib/smol/client.dart
+++ b/lib/smol/client.dart
@@ -144,7 +144,7 @@ class SmolClient {
     // registration and fetching demand it anyway (sec 4), so restoring is
     // stopped at the pin step rather than letting the account bind to a
     // server whose key nobody verified.
-    if (store.serverPin(addr.host) == null) {
+    if (store.serverPin(addr.host, addr.port) == null) {
       throw SmolError("no pinned key for ${addr.host}. Obtain it from the "
           "operator through a trusted channel, then pin it in settings.");
     }
@@ -157,7 +157,8 @@ class SmolClient {
     }
   }
 
-  void pinServer(String host, String keyB32) => store.pinServer(host, keyB32);
+  void pinServer(String host, String keyB32, int port) =>
+      store.pinServer(host, keyB32, port);
 
   Future<void> registerAccount(String addressText, {String token = ""}) async {
     final addr = parseAddress(addressText);
diff --git a/lib/smol/config.dart b/lib/smol/config.dart
index aae3fee..c879c72 100644
--- a/lib/smol/config.dart
+++ b/lib/smol/config.dart
@@ -9,6 +9,7 @@
 // removable in settings like any other, and never overwrites a host the user
 // (or a previous install) already pinned.
 
+import "package:smol_mail/smol/address.dart";
 import "package:smol_mail/smol/store.dart";
 
 const _presetHost = String.fromEnvironment("SMOL_PRESET_SERVER");
@@ -16,7 +17,7 @@ const _presetKey = String.fromEnvironment("SMOL_PRESET_SERVER_KEY");
 
 void applyPresetServer(SmolStore store) {
   if (_presetHost.isEmpty || _presetKey.isEmpty) return;
-  if (store.serverPin(_presetHost) != null) return;
+  if (store.serverPin(_presetHost, defaultPort) != null) return;
   // A malformed preset leaves the host unpinned rather than blocking boot.
-  store.pinServer(_presetHost, _presetKey);
+  store.pinServer(_presetHost, _presetKey, defaultPort);
 }
diff --git a/lib/smol/store.dart b/lib/smol/store.dart
index ef4a414..09ea825 100644
--- a/lib/smol/store.dart
+++ b/lib/smol/store.dart
@@ -291,10 +291,11 @@ class SmolStore {
   // --- pins -------------------------------------------------------------------
 
   /// Pins a server's static key (§4): sync, because it is one local write.
-  void pinServer(String host, String keyB32) =>
-      _ffi.pinServer(_native.store!, host, keyB32);
+  void pinServer(String host, String keyB32, int port) =>
+      _ffi.pinServer(_native.store!, host, keyB32, port);
 
-  String? serverPin(String host) => _ffi.serverPin(_native.store!, host);
+  String? serverPin(String host, int port) =>
+      _ffi.serverPin(_native.store!, host, port);
 
   List<(String, String)> allPins() {
     final rows = _ffi.pins(_native.store!);
@@ -304,7 +305,8 @@ class SmolStore {
     ];
   }
 
-  Future<void> unpinServer(String host) async => _native.unpinServer(host);
+  Future<void> unpinServer(String host, int port) async =>
+      _native.unpinServer(host, port);
 
   // --- backups ----------------------------------------------------------------
 
diff --git a/native/Cargo.lock b/native/Cargo.lock
index 209a64d..9ae3a6b 100644
--- a/native/Cargo.lock
+++ b/native/Cargo.lock
@@ -271,7 +271,7 @@ checksum = "aedcfb3409746eddb02b9e19ebda1c3394f759a152e48ee875a0844d1b955484"
 [[package]]
 name = "fumi-core"
 version = "0.1.0"
-source = "git+ssh://git@code.randogoth.com:2222/randogoth/fumi.git?rev=2d65d66#2d65d66012fa40121e4dc3d8d15db9ffc486569a"
+source = "git+ssh://git@code.randogoth.com:2222/randogoth/fumi.git?rev=1468f3c#1468f3cbc0a89a0cb073f46a985911c0327885d1"
 dependencies = [
  "chacha20poly1305",
  "data-encoding",
diff --git a/native/Cargo.toml b/native/Cargo.toml
index adb0e95..52a28c3 100644
--- a/native/Cargo.toml
+++ b/native/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 crate-type = ["lib", "cdylib"]
 
 [dependencies]
-fumi-core = { git = "ssh://git@code.randogoth.com:2222/randogoth/fumi.git", rev = "2d65d66" }
+fumi-core = { git = "ssh://git@code.randogoth.com:2222/randogoth/fumi.git", rev = "1468f3c" }
 rand_core = { version = "0.6", features = ["getrandom"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
diff --git a/native/src/ffi.rs b/native/src/ffi.rs
index f16f3c8..8b036e5 100644
--- a/native/src/ffi.rs
+++ b/native/src/ffi.rs
@@ -126,22 +126,29 @@ struct ErrorJson {
     /// The raw byte behind an UNKNOWN_STATUS (code 11).
     #[serde(skip_serializing_if = "Option::is_none")]
     status: Option<u8>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    port: Option<u16>,
 }
 
 impl ErrorJson {
     fn of(error: &Error) -> ErrorJson {
         let message = error.to_string();
-        let (host, pinned, presented, address, known, offered, status) = match error {
+        let (host, pinned, presented, address, known, offered, status, port) = match error {
             Error::UnknownStatus(status, _) => {
-                (None, None, None, None, None, None, Some(*status))
+                (None, None, None, None, None, None, Some(*status), None)
+            }
+            Error::NotPinned { host, port } => {
+                (Some(host.clone()), None, None, None, None, None, None, Some(*port))
+            }
+            Error::Unreachable { host, .. } => {
+                (Some(host.clone()), None, None, None, None, None, None, None)
             }
-            Error::NotPinned { host } => (Some(host.clone()), None, None, None, None, None, None),
-            Error::Unreachable { host, .. } => (Some(host.clone()), None, None, None, None, None, None),
             Error::HandshakeRefused { host, .. } => {
-                (Some(host.clone()), None, None, None, None, None, None)
+                (Some(host.clone()), None, None, None, None, None, None, None)
             }
             Error::PinMismatch {
                 host,
+                port,
                 pinned,
                 presented,
             } => (
@@ -152,6 +159,7 @@ impl ErrorJson {
                 None,
                 None,
                 None,
+                Some(*port),
             ),
             Error::KeyChanged {
                 address,
@@ -165,8 +173,9 @@ impl ErrorJson {
                 Some(b32(known)),
                 Some(b32(offered)),
                 None,
+                None,
             ),
-            _ => (None, None, None, None, None, None, None),
+            _ => (None, None, None, None, None, None, None, None),
         };
         ErrorJson {
             code: code_of(error),
@@ -178,6 +187,7 @@ impl ErrorJson {
             known,
             offered,
             status,
+            port,
         }
     }
 }
@@ -383,23 +393,24 @@ pub extern "C" fn smol_pin_server(
     store: *mut Store,
     host: *const c_char,
     key_b32: *const c_char,
+    port: u16,
 ) -> i32 {
     status(|| {
         let store = unsafe { store.as_ref().ok_or_else(|| Error::Other("store handle is null".into()))? };
         let key: [u8; KEY_LEN] = unb32(text(key_b32)?)?
             .try_into()
             .map_err(|_| Error::Other("server key must decode to 32 bytes".into()))?;
-        store.pin_server(text(host)?, &key)
+        store.pin_server(text(host)?, port, &key)
     })
 }
 
 /// The pinned key for a host, base32. Empty string: none pinned. Null: error.
 #[no_mangle]
-pub extern "C" fn smol_server_pin(store: *mut Store, host: *const c_char) -> *mut c_char {
+pub extern "C" fn smol_server_pin(store: *mut Store, host: *const c_char, port: u16) -> *mut c_char {
     match guarded(|| {
         let store = unsafe { store.as_ref().ok_or_else(|| Error::Other("store handle is null".into()))? };
         Ok(store
-            .server_pin(text(host)?)?
+            .server_pin(text(host)?, port)?
             .map(|key| b32(&key))
             .unwrap_or_default())
     }) {
@@ -426,12 +437,13 @@ pub extern "C" fn smol_contact_save(
     })
 }
 
-/// Removes a pin: the next session against that host is trust on first use.
+/// Removes a pin: the next session against that host and port is trust on
+/// first use.
 #[no_mangle]
-pub extern "C" fn smol_unpin_server(store: *mut Store, host: *const c_char) -> i32 {
+pub extern "C" fn smol_unpin_server(store: *mut Store, host: *const c_char, port: u16) -> i32 {
     status(|| {
         let store = unsafe { store.as_ref().ok_or_else(|| Error::Other("store handle is null".into()))? };
-        store.unpin_server(text(host)?)
+        store.unpin_server(text(host)?, port)
     })
 }
 
@@ -1178,6 +1190,7 @@ mod tests {
         let json: serde_json::Value = serde_json::from_str(&slot).unwrap();
         assert_eq!(json["code"], NOT_PINNED);
         assert_eq!(json["host"], "127.0.0.1");
+        assert_eq!(json["port"], 19619);
 
         // Strings returned on success must be freed without double-free.
         assert_eq!(take(smol_store_account(store)), "");
@@ -1193,7 +1206,8 @@ mod tests {
     fn mail_and_contacts_render_as_json() {
         let store = smol_store_memory();
         let s = unsafe { &*store };
-        s.pin_server("example.org", &[1u8; KEY_LEN]).unwrap();
+        s.pin_server("example.org", fumi_core::address::DEFAULT_PORT, &[1u8; KEY_LEN])
+            .unwrap();
         s.save_contact("alice@example.org", &[2u8; KEY_LEN], true).unwrap();
         s.save_history("alice@example.org", &[9u8; KEY_LEN], 500).unwrap();
         s.store_inbox(&[3u8; ID_LEN], b"sealed", 7, false, true).unwrap();
diff --git a/native/src/lib.rs b/native/src/lib.rs
index b04be2b..2008ce7 100644
--- a/native/src/lib.rs
+++ b/native/src/lib.rs
@@ -86,8 +86,8 @@ mod tests {
         let alice_addr =
             Address::parse(&format!("a{run}@127.0.0.1:19619")).unwrap();
         let bob_addr = Address::parse(&format!("b{run}@127.0.0.1:19619")).unwrap();
-        alice_store.pin_server("127.0.0.1", &server).unwrap();
-        bob_store.pin_server("127.0.0.1", &server).unwrap();
+        alice_store.pin_server("127.0.0.1", 19619, &server).unwrap();
+        bob_store.pin_server("127.0.0.1", 19619, &server).unwrap();
 
         register(&alice_store, &alice_addr, &alice, None, 5).unwrap();
         register(&bob_store, &bob_addr, &bob, None, 5).unwrap();
@@ -168,8 +168,8 @@ mod tests {
         let run = fumi_core::crypto::b32(&suffix);
         let alice_addr = Address::parse(&format!("a{run}@127.0.0.1:19619")).unwrap();
         let bob_addr = Address::parse(&format!("b{run}@127.0.0.1:19619")).unwrap();
-        alice_store.pin_server("127.0.0.1", &server).unwrap();
-        bob_store.pin_server("127.0.0.1", &server).unwrap();
+        alice_store.pin_server("127.0.0.1", 19619, &server).unwrap();
+        bob_store.pin_server("127.0.0.1", 19619, &server).unwrap();
         register(&alice_store, &alice_addr, &alice, None, 5).unwrap();
         register(&bob_store, &bob_addr, &bob, None, 5).unwrap();
 
@@ -272,7 +272,7 @@ mod tests {
             fumi_core::address::Address::parse(&format!("u{run}@{host}:19619"))
                 .unwrap()
                 .with_dial("127.0.0.1");
-        store.pin_server(&host, &server).unwrap();
+        store.pin_server(&host, 19619, &server).unwrap();
         register(&store, &addr, &account, None, 5).unwrap();
         assert_eq!(store.account().unwrap().unwrap().short(),
             format!("u{run}@{host}:19619"));
@@ -296,7 +296,10 @@ mod tests {
 
         let unpinned = Store::open_in_memory().unwrap();
         match connect(&unpinned, &addr, true, 5) {
-            Err(Error::NotPinned { host }) => assert_eq!(host, "127.0.0.1"),
+            Err(Error::NotPinned { host, port }) => {
+                assert_eq!(host, "127.0.0.1");
+                assert_eq!(port, 19619);
+            }
             Err(err) => panic!("expected NotPinned, got {err}"),
             Ok(_) => panic!("expected NotPinned, connected"),
         }
@@ -304,7 +307,7 @@ mod tests {
         let mut wrong = [0u8; KEY_LEN];
         OsRng.fill_bytes(&mut wrong);
         let mismatched = Store::open_in_memory().unwrap();
-        mismatched.pin_server("127.0.0.1", &wrong).unwrap();
+        mismatched.pin_server("127.0.0.1", 19619, &wrong).unwrap();
         match connect(&mismatched, &addr, true, 5) {
             Err(Error::PinMismatch { .. }) => {}
             Err(err) => panic!("expected PinMismatch, got {err}"),
@@ -348,8 +351,8 @@ mod tests {
         let run = fumi_core::crypto::b32(&suffix);
         let carol_addr = Address::parse(&format!("c{run}@127.0.0.1:19619")).unwrap();
         let alice_addr = Address::parse(&format!("d{run}@127.0.0.1:19619")).unwrap();
-        carol_store.pin_server("127.0.0.1", &server).unwrap();
-        alice_store.pin_server("127.0.0.1", &server).unwrap();
+        carol_store.pin_server("127.0.0.1", 19619, &server).unwrap();
+        alice_store.pin_server("127.0.0.1", 19619, &server).unwrap();
         register(&carol_store, &carol_addr, &carol, None, 5).unwrap();
         register(&alice_store, &alice_addr, &alice, None, 5).unwrap();
 
diff --git a/test/e2e_test.dart b/test/e2e_test.dart
index 2c67ea3..9a83dbd 100644
--- a/test/e2e_test.dart
+++ b/test/e2e_test.dart
@@ -60,7 +60,7 @@ void main() {
     final me = client.identity!;
     final user = "e2e${hex(randomBytes(4))}";
     final address = parseAddress("$user@$host");
-    store.pinServer(host, serverKey);
+    store.pinServer(host, serverKey, port);
 
     await client.registerAccount(address.short);
     expect(client.accountAddress()!.short, address.short);
@@ -129,7 +129,7 @@ void main() {
     secondStore.restoreMaster(store.master()!, 0);
     await expectLater(
         secondDevice.recallAccount(address.short), throwsA(isA<SmolError>()));
-    secondStore.pinServer(host, serverKey);
+    secondStore.pinServer(host, serverKey, port);
     await expectLater(
         secondDevice.registerAccount(address.short), throwsA(isA<SmolError>()));
     final bound = await secondDevice.recallAccount(address.short);
@@ -157,7 +157,7 @@ void main() {
     await client.createIdentity();
     final user = "e2ekeep${hex(randomBytes(4))}";
     final address = parseAddress("$user@$host");
-    store.pinServer(host, serverKey);
+    store.pinServer(host, serverKey, port);
     await client.registerAccount(address.short);
 
     await store.setLeaveOnServer(true);
diff --git a/test/interop_fumi_test.dart b/test/interop_fumi_test.dart
index c44f0f6..43d5d4e 100644
--- a/test/interop_fumi_test.dart
+++ b/test/interop_fumi_test.dart
@@ -13,6 +13,7 @@ import "dart:typed_data";
 import "package:flutter_test/flutter_test.dart";
 import "package:hive_flutter/hive_flutter.dart";
 
+import "package:smol_mail/smol/address.dart";
 import "package:smol_mail/smol/store.dart";
 
 const fumiBinary = "../fumi/target/release/fumi";
@@ -38,7 +39,7 @@ void main() {
         stateBox: "interop-state",
         readBox: "interop-read");
     mine.restoreMaster(master, 0);
-    mine.pinServer("example.org", pinKey);
+    mine.pinServer("example.org", pinKey, defaultPort);
     // One contact, bound to the current key; rotation history is written by
     // the trust engine on a validated rotation, not by a plain re-save.
     await mine.saveContact("alice@example.org", pinKey, verified: true);
@@ -72,6 +73,6 @@ void main() {
     // The binding survived both directions of the round trip.
     final contact = restored.contact("alice@example.org")!;
     expect(contact.key, pinKey);
-    expect(restored.serverPin("example.org"), pinKey);
+    expect(restored.serverPin("example.org", defaultPort), pinKey);
   });
 }
diff --git a/test/native_binding_test.dart b/test/native_binding_test.dart
index 3a36ebc..82750b5 100644
--- a/test/native_binding_test.dart
+++ b/test/native_binding_test.dart
@@ -11,6 +11,7 @@ import "package:flutter_test/flutter_test.dart";
 
 import "package:smol_mail/native/client.dart";
 import "package:smol_mail/native/ffi.dart";
+import "package:smol_mail/smol/address.dart";
 
 const spikeServerKey = "wukbhdiwboarbg4pujxstbqi3caveunrruaopbwxr226ga3xv5ga";
 const spikeServer = "127.0.0.1";
@@ -39,7 +40,9 @@ void main() async {
     expect(await client.accountAddress(), isNull);
 
     // A pinned but dead host fails by code, never by prose: Unreachable (7).
-    await client.pinServer("127.0.0.1", spikeServerKey);
+    // The pin is scoped to the dead port itself — a default-port pin would
+    // not cover it, and the register would fail NotPinned instead.
+    await client.pinServer("127.0.0.1", spikeServerKey, 19629);
     client.setMaster(Uint8List.fromList(List.filled(32, 9)));
     try {
       await client.register("nobody@127.0.0.1:19629");
@@ -63,7 +66,7 @@ void main() async {
     final mine = FumiNative("${dir.path}/mine.db");
     await mine.open();
     mine.setMaster(master);
-    await mine.pinServer("example.org", spikeServerKey);
+    await mine.pinServer("example.org", spikeServerKey, defaultPort);
     await mine.importContact(
         "smol://alice@example.org/ayb6y3mwr3cfkcmcaqbn3cgfi6xsrsoqkalykw5s7oqmwqcpnmsq");
 
@@ -76,7 +79,7 @@ void main() async {
         as Map<String, dynamic>;
     expect(summary["contactsAdded"], 1);
     expect(summary["pinsAdded"], 1);
-    expect(await restored.serverPin("example.org"), spikeServerKey);
+    expect(await restored.serverPin("example.org", defaultPort), spikeServerKey);
 
     await mine.close();
     await restored.close();
@@ -98,14 +101,14 @@ void main() async {
     final alice = FumiNative("${dir.path}/alice.db");
     await alice.open();
     alice.setMaster(aliceMaster);
-    await alice.pinServer(spikeServer, spikeServerKey);
+    await alice.pinServer(spikeServer, spikeServerKey, spikePort);
     await alice.register("a$run@$spikeServer:$spikePort");
     expect(await alice.accountAddress(), "a$run@$spikeServer:$spikePort");
 
     final bob = FumiNative("${dir.path}/bob.db");
     await bob.open();
     bob.setMaster(bobMaster);
-    await bob.pinServer(spikeServer, spikeServerKey);
+    await bob.pinServer(spikeServer, spikeServerKey, spikePort);
     await bob.register("b$run@$spikeServer:$spikePort");
 
     final sent = await alice.send("b$run@$spikeServer:$spikePort",
@@ -147,7 +150,7 @@ void main() async {
     final alice = FumiNative("${dir.path}/alice.db");
     await alice.open();
     alice.setMaster(aliceMaster);
-    await alice.pinServer(spikeServer, spikeServerKey);
+    await alice.pinServer(spikeServer, spikeServerKey, spikePort);
     await alice.register("a$run@$spikeServer:$spikePort");
 
     final bob = FumiNative("${dir.path}/bob.db");
@@ -156,7 +159,7 @@ void main() async {
     // The onboarding screen zeroes its own master reference on dispose;
     // whatever holds the master after that must not share that buffer.
     bobMaster.fillRange(0, 32, 0);
-    await bob.pinServer(spikeServer, spikeServerKey);
+    await bob.pinServer(spikeServer, spikeServerKey, spikePort);
     await bob.register("b$run@$spikeServer:$spikePort");
 
     await alice.send("b$run@$spikeServer:$spikePort",
diff --git a/test/recall_flow_test.dart b/test/recall_flow_test.dart
index 3ddfa97..4f18021 100644
--- a/test/recall_flow_test.dart
+++ b/test/recall_flow_test.dart
@@ -36,7 +36,7 @@ class StubClient extends SmolClient {
   @override
   Future<SmolAddress> restoreAndRecall(String masterHex, String addressText) async {
     final addr = parseAddress(addressText);
-    if (store.serverPin(addr.host) == null) {
+    if (store.serverPin(addr.host, addr.port) == null) {
       throw SmolError("no pinned key for ${addr.host}");
     }
     store.restoreMaster(unhex(masterHex.trim()), 0);
diff --git a/test/store_test.dart b/test/store_test.dart
index 5e296af..c31163b 100644
--- a/test/store_test.dart
+++ b/test/store_test.dart
@@ -8,6 +8,7 @@ import "dart:typed_data";
 import "package:flutter_test/flutter_test.dart";
 import "package:hive_flutter/hive_flutter.dart";
 
+import "package:smol_mail/smol/address.dart";
 import "package:smol_mail/smol/store.dart";
 
 Uint8List randomBytes(int n) =>
@@ -66,11 +67,11 @@ void main() {
     expect(store.allPins(), isEmpty);
     // A syntactically valid key: the system server's, a real 52-char form.
     const key = "lm2gqd7e5q67xq3isc5hx6jfj2q7a7xvq4l7trctxipudujovmgq";
-    store.pinServer("example.org", key);
-    expect(store.serverPin("example.org"), key);
+    store.pinServer("example.org", key, defaultPort);
+    expect(store.serverPin("example.org", defaultPort), key);
     expect(store.allPins().length, 1);
-    await store.unpinServer("example.org");
-    expect(store.serverPin("example.org"), isNull);
+    await store.unpinServer("example.org", defaultPort);
+    expect(store.serverPin("example.org", defaultPort), isNull);
   });
 
   test("wipe clears every secret and mark, overwriting the master", () async {
@@ -80,7 +81,7 @@ void main() {
     // The store's own copy, read back before the wipe.
     final stored = store.master()!;
     store.pinServer("example.org",
-        "lm2gqd7e5q67xq3isc5hx6jfj2q7a7xvq4l7trctxipudujovmgq");
+        "lm2gqd7e5q67xq3isc5hx6jfj2q7a7xvq4l7trctxipudujovmgq", defaultPort);
     store.markRead("cd" * 32);
 
     await store.wipe();
@@ -93,7 +94,7 @@ void main() {
     expect(master.every((b) => b == 0), isFalse);
     expect(store.master(), isNull);
     expect(store.identity(), isNull);
-    expect(store.serverPin("example.org"), isNull);
+    expect(store.serverPin("example.org", defaultPort), isNull);
     expect(store.isRead("cd" * 32), isFalse);
   });
 }