Do not prepend subject to mailing list chat messages (#3253)

src/receive_imf.rs

@@ -3572,6 +3572,27 @@ Hello mailinglist!\r\n"
         )
     }
 
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_mailing_list_chat_message() {
+        let t = TestContext::new_alice().await;
+
+        receive_imf(
+            &t,
+            include_bytes!("../test-data/message/mailinglist_chat_message.eml"),
+            false,
+        )
+        .await
+        .unwrap();
+        let msg = t.get_last_msg().await;
+        assert_eq!(msg.text, Some("hello, this is a test 👋\n\n_______________________________________________\nTest1 mailing list -- test1@example.net\nTo unsubscribe send an email to test1-leave@example.net".to_string()));
+        assert!(!msg.has_html());
+        let chat = Chat::load_from_db(&t, msg.chat_id).await.unwrap();
+        assert_eq!(chat.typ, Chattype::Mailinglist);
+        assert_eq!(chat.blocked, Blocked::Request);
+        assert_eq!(chat.grpid, "test1.example.net");
+        assert_eq!(chat.name, "Test1");
+    }
+
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_dont_show_tokens_in_contacts_list() {
         check_dont_show_in_contacts_list(