diff --git a/app/Console/Commands/User/UserAccountDelete.php b/app/Console/Commands/User/UserAccountDelete.php
index 07acdc6a6..c6206492b 100644
--- a/app/Console/Commands/User/UserAccountDelete.php
+++ b/app/Console/Commands/User/UserAccountDelete.php
@@ -322,7 +322,13 @@ class UserAccountDelete extends Command
 
         $responses = Http::pool(function (Pool $pool) use ($urlList, $privateKey, $keyId, $digest, $payload, $payloadLen) {
             foreach ($urlList as $url) {
-                $headers = HttpSignature::signRawWithDigest($privateKey, $keyId, $url, $digest);
+                // Pass User-Agent/Accept per request so they are actually sent
+                // (and signed); Http::pool does not inherit the makeHttpClient
+                // instance headers, so without this Guzzle sends its default UA.
+                $headers = HttpSignature::signRawWithDigest($privateKey, $keyId, $url, $digest, [
+                    'User-Agent' => 'Pixelfed ('.config('app.url').')',
+                    'Accept' => 'application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
+                ]);
                 $headers['Content-Type'] = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
                 $headers['Content-Length'] = (string) $payloadLen;
 
@@ -392,7 +398,10 @@ class UserAccountDelete extends Command
 
     protected function sendDebug(string $url, string $payload, string $digest, string $privateKey, string $keyId): int
     {
-        $headers = HttpSignature::signRawWithDigest($privateKey, $keyId, $url, $digest);
+        $headers = HttpSignature::signRawWithDigest($privateKey, $keyId, $url, $digest, [
+            'User-Agent' => 'Pixelfed ('.config('app.url').')',
+            'Accept' => 'application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
+        ]);
 
         $headers['Content-Type'] = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
 
diff --git a/tests/Feature/Console/UserAccountDeleteUserAgentTest.php b/tests/Feature/Console/UserAccountDeleteUserAgentTest.php
new file mode 100644
index 000000000..a641f3dbb
--- /dev/null
+++ b/tests/Feature/Console/UserAccountDeleteUserAgentTest.php
@@ -0,0 +1,72 @@
+<?php
+
+use App\Console\Commands\User\UserAccountDelete;
+use Illuminate\Foundation\Testing\LazilyRefreshDatabase;
+use Illuminate\Support\Facades\Http;
+
+uses(LazilyRefreshDatabase::class);
+
+/*
+|--------------------------------------------------------------------------
+| UserAccountDelete outbound User-Agent
+|--------------------------------------------------------------------------
+|
+| The federated account-deletion POSTs must carry the Pixelfed User-Agent
+| (set per-request via the HTTP signature), not Guzzle's default. Http::pool
+| does not inherit the makeHttpClient instance headers.
+|
+*/
+
+function generatePrivateKeyPem(): string
+{
+    $res = openssl_pkey_new([
+        'private_key_bits' => 2048,
+        'private_key_type' => OPENSSL_KEYTYPE_RSA,
+    ]);
+    openssl_pkey_export($res, $pem);
+
+    return $pem;
+}
+
+it('sends the Pixelfed User-Agent on pooled delete deliveries', function () {
+    Http::fake([
+        '*' => Http::response('', 202),
+    ]);
+
+    $privateKey = generatePrivateKeyPem();
+    $keyId = 'https://local.test/users/alice#main-key';
+    $payload = '{"type":"Delete"}';
+    $digest = base64_encode(hash('sha256', $payload, true));
+
+    $urls = collect(['https://remote.example/f/inbox']);
+
+    $command = app(UserAccountDelete::class);
+    $ref = new ReflectionMethod($command, 'sendBatch');
+    $ref->setAccessible(true);
+
+    // sendBatch(PendingRequest $client, string $privateKey, string $keyId,
+    //   string $digest, Collection $urls, string $payload, int $payloadLen,
+    //   int $concurrency, bool $verboseErrors)
+    $client = (new ReflectionMethod($command, 'makeHttpClient'));
+    $client->setAccessible(true);
+    $pendingClient = $client->invoke($command);
+
+    $ref->invoke(
+        $command,
+        $pendingClient,
+        $privateKey,
+        $keyId,
+        $digest,
+        $urls,
+        $payload,
+        strlen($payload),
+        5,
+        false
+    );
+
+    Http::assertSent(function ($request) {
+        return $request->url() === 'https://remote.example/f/inbox'
+            && $request->hasHeader('User-Agent')
+            && str_contains($request->header('User-Agent')[0], 'Pixelfed');
+    });
+});