C: a441 CAPABILITY
  S: * CAPABILITY IMAP4rev2 XPIG-LATIN
  S: a441 OK CAPABILITY completed
  C: A442 XPIG-LATIN
  S: * XPIG-LATIN ow-nay eaking-spay ig-pay atin-lay
  S: A442 OK XPIG-LATIN ompleted-cay