diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
index 00c1a1b96..8d9d07874 100644
--- a/lib/pleroma/web/activity_pub/publisher.ex
+++ b/lib/pleroma/web/activity_pub/publisher.ex
@@ -172,42 +172,8 @@ defp get_cc_ap_ids(ap_id, recipients) do
     |> Enum.map(& &1.ap_id)
   end
 
-  defp maybe_use_sharedinbox(%User{shared_inbox: nil, inbox: inbox}), do: inbox
-  defp maybe_use_sharedinbox(%User{shared_inbox: shared_inbox}), do: shared_inbox
-
-  @doc """
-  Determine a user inbox to use based on heuristics.  These heuristics
-  are based on an approximation of the ``sharedInbox`` rules in the
-  [ActivityPub specification][ap-sharedinbox].
-
-  Please do not edit this function (or its children) without reading
-  the spec, as editing the code is likely to introduce some breakage
-  without some familiarity.
-
-     [ap-sharedinbox]: https://www.w3.org/TR/activitypub/#shared-inbox-delivery
-  """
-  def determine_inbox(
-        %Activity{data: activity_data},
-        %User{inbox: inbox} = user
-      ) do
-    to = activity_data["to"] || []
-    cc = activity_data["cc"] || []
-    type = activity_data["type"]
-
-    cond do
-      type == "Delete" ->
-        maybe_use_sharedinbox(user)
-
-      Pleroma.Constants.as_public() in to || Pleroma.Constants.as_public() in cc ->
-        maybe_use_sharedinbox(user)
-
-      length(to) + length(cc) > 1 ->
-        maybe_use_sharedinbox(user)
-
-      true ->
-        inbox
-    end
-  end
+  defp try_sharedinbox(%User{shared_inbox: nil, inbox: inbox}), do: inbox
+  defp try_sharedinbox(%User{shared_inbox: shared_inbox}), do: shared_inbox
 
   @doc """
   Publishes an activity with BCC to all relevant peers.
@@ -263,7 +229,7 @@ def publish(%User{} = actor, %Activity{} = activity) do
 
     recipients(actor, activity)
     |> Enum.map(fn %User{} = user ->
-      determine_inbox(activity, user)
+      try_sharedinbox(user)
     end)
     |> Enum.uniq()
     |> Enum.filter(fn inbox -> should_federate?(inbox) end)
diff --git a/test/pleroma/web/activity_pub/publisher_test.exs b/test/pleroma/web/activity_pub/publisher_test.exs
index 675efae3f..40e635467 100644
--- a/test/pleroma/web/activity_pub/publisher_test.exs
+++ b/test/pleroma/web/activity_pub/publisher_test.exs
@@ -11,7 +11,6 @@ defmodule Pleroma.Web.ActivityPub.PublisherTest do
   import Tesla.Mock
   import Mock
 
-  alias Pleroma.Activity
   alias Pleroma.Instances
   alias Pleroma.Object
   alias Pleroma.Web.ActivityPub.Publisher
@@ -51,82 +50,6 @@ test "it returns links" do
     end
   end
 
-  describe "determine_inbox/2" do
-    test "it returns sharedInbox for messages involving as:Public in to" do
-      user = insert(:user, %{shared_inbox: "http://example.com/inbox"})
-
-      activity = %Activity{
-        data: %{"to" => [@as_public], "cc" => [user.follower_address]}
-      }
-
-      assert Publisher.determine_inbox(activity, user) == "http://example.com/inbox"
-    end
-
-    test "it returns sharedInbox for messages involving as:Public in cc" do
-      user = insert(:user, %{shared_inbox: "http://example.com/inbox"})
-
-      activity = %Activity{
-        data: %{"cc" => [@as_public], "to" => [user.follower_address]}
-      }
-
-      assert Publisher.determine_inbox(activity, user) == "http://example.com/inbox"
-    end
-
-    test "it returns sharedInbox for messages involving multiple recipients in to" do
-      user = insert(:user, %{shared_inbox: "http://example.com/inbox"})
-      user_two = insert(:user)
-      user_three = insert(:user)
-
-      activity = %Activity{
-        data: %{"cc" => [], "to" => [user.ap_id, user_two.ap_id, user_three.ap_id]}
-      }
-
-      assert Publisher.determine_inbox(activity, user) == "http://example.com/inbox"
-    end
-
-    test "it returns sharedInbox for messages involving multiple recipients in cc" do
-      user = insert(:user, %{shared_inbox: "http://example.com/inbox"})
-      user_two = insert(:user)
-      user_three = insert(:user)
-
-      activity = %Activity{
-        data: %{"to" => [], "cc" => [user.ap_id, user_two.ap_id, user_three.ap_id]}
-      }
-
-      assert Publisher.determine_inbox(activity, user) == "http://example.com/inbox"
-    end
-
-    test "it returns sharedInbox for messages involving multiple recipients in total" do
-      user =
-        insert(:user, %{
-          shared_inbox: "http://example.com/inbox",
-          inbox: "http://example.com/personal-inbox"
-        })
-
-      user_two = insert(:user)
-
-      activity = %Activity{
-        data: %{"to" => [user_two.ap_id], "cc" => [user.ap_id]}
-      }
-
-      assert Publisher.determine_inbox(activity, user) == "http://example.com/inbox"
-    end
-
-    test "it returns inbox for messages involving single recipients in total" do
-      user =
-        insert(:user, %{
-          shared_inbox: "http://example.com/inbox",
-          inbox: "http://example.com/personal-inbox"
-        })
-
-      activity = %Activity{
-        data: %{"to" => [user.ap_id], "cc" => []}
-      }
-
-      assert Publisher.determine_inbox(activity, user) == "http://example.com/personal-inbox"
-    end
-  end
-
   describe "publish_one/1" do
     test "publish to url with with different ports" do
       inbox80 = "http://42.site/users/nick1/inbox"