Following options are available with READ command (see also HELP ALTER):
  A   show sender of the mail
  B   show size in bytes
  C   continous, switch off linestop
  D   show date
  E   show address (or boardname)
  F   show BBS of origin (frombox)
  G   don't save the read status for the message (only with own messages)
  H   show R:-Header and flags of the message (excludes the option P)
  I   show BID
  J   show filename of the message
  K   show mail status behind number, see HELP DIR
  L   show lifetime
  M   show target address (H-address)
  N   ask "Delete message?" after reading the message
  O   show target address (only first component of the H-address)
  P   show mail flags
  Q   (quiet) show only the BIN-part of the message
  R   show calls who read the mail
  S   output of complete mailfile with AutoBIN (only board mails)
  T   show time
  U   show uplink line
  W   show title
  X   shows only the text-part, no BIN-part of the message
  Y   show year at the date
  Z   show number of lines in the mail