Added retry for sent orphans

app/src/main/java/eu/faircode/email/DaoMessage.java

@@ -805,6 +805,15 @@ public interface DaoMessage {
             "  AND m.msgid = message.msgid)")
     int deleteOrphans(long folder);
 
+    @Query("SELECT * FROM message" +
+            " WHERE folder = :folder" +
+            " AND uid IS NULL" +
+            " AND NOT EXISTS" +
+            "  (SELECT * FROM operation" +
+            "  WHERE operation.message = message.id" +
+            "  AND operation.name = '" + EntityOperation.EXISTS + "')")
+    List<EntityMessage> getSentOrphans(long folder);
+
     @Query("SELECT id FROM message" +
             " WHERE folder = :folder" +
             " AND received < :before" +

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -1519,6 +1519,13 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                                     force = true;
                             }
                         }
+
+                        if (EntityFolder.SENT.equals(folder.type)) {
+                            List<EntityMessage> orphans = db.message().getSentOrphans(folder.id);
+                            if (orphans != null)
+                                for (EntityMessage orphan : orphans)
+                                    EntityOperation.queue(context, orphan, EntityOperation.EXISTS);
+                        }
                     }
 
                     db.setTransactionSuccessful();