C: A999 UID FETCH 4827313:4828442 FLAGS
  S: * 23 FETCH (FLAGS (\Seen) UID 4827313)
  S: * 24 FETCH (FLAGS (\Seen) UID 4827943)
  S: * 25 FETCH (FLAGS (\Seen) UID 4828442)
  S: A999 OK UID FETCH completed