ignore some site settings for emails sent to mailinglist mirror category

spec/components/email/receiver_spec.rb

@@ -795,4 +795,23 @@ describe Email::Receiver do
     end
   end
 
+  context "mailinglist mirror" do
+    before do
+      SiteSetting.block_auto_generated_emails = true
+      SiteSetting.find_related_post_with_key = true
+
+      Fabricate(:mailinglist_mirror_category)
+    end
+
+    it "should allow creating topic even when email is autogenerated" do
+      expect { process(:mailinglist) }.to change { Topic.count }
+    end
+
+    it "should allow replying without reply key" do
+      process(:mailinglist)
+      topic = Topic.last
+
+      expect { process(:mailinglist_reply) }.to change { topic.posts.count }
+    end
+  end
 end