diff --git a/hc/api/tests/test_bounce.py b/hc/api/tests/test_bounce.py
index 46562345..7835abc7 100644
--- a/hc/api/tests/test_bounce.py
+++ b/hc/api/tests/test_bounce.py
@@ -54,3 +54,13 @@ class BounceTestCase(BaseTestCase):
         url = "/api/v1/notifications/%s/bounce" % self.n.code
         r = self.client.get(url)
         self.assertEqual(r.status_code, 405)
+
+    def test_does_not_unsubscribe_transient_bounces(self):
+        url = "/api/v1/notifications/%s/bounce?type=Transient" % self.n.code
+        self.client.post(url, "foo", content_type="text/plain")
+
+        self.n.refresh_from_db()
+        self.assertEqual(self.n.error, "foo")
+
+        self.channel.refresh_from_db()
+        self.assertTrue(self.channel.email_verified)
diff --git a/hc/api/views.py b/hc/api/views.py
index 2e7a9830..4604aa79 100644
--- a/hc/api/views.py
+++ b/hc/api/views.py
@@ -272,8 +272,9 @@ def bounce(request, code):
     notification.error = request.body.decode()[:200]
     notification.save()
 
-    notification.channel.email_verified = False
-    notification.channel.save()
+    if request.GET.get("type") in (None, "Permanent"):
+        notification.channel.email_verified = False
+        notification.channel.save()
 
     return HttpResponse()