S: * CAPABILITY [...] QUOTA QUOTA=RES-STORAGE QUOTA=RES-
   MESSAGE [...]

   [...]

   C: S0003 STATUS INBOX (MESSAGES DELETED DELETED-STORAGE)

   S: * STATUS INBOX (MESSAGES 12 DELETED 4 DELETED-STORAGE 8)

   // 12 messages, 4 of which would be deleted when an EXPUNGE
   happens.

   S: S0003 OK Status complete.