MBOX
~(MPRESERVE | MTOUCH | MBOX), MTOUCH | MBOX);
~(MPRESERVE|MSAVED|MBOX|MDELETED|MTOUCH), MDELETED|MTOUCH);
dot = set_m_flag(*ip, ~(MBOX | MPRESERVE), MPRESERVE);
if (flags.f_or & MBOX)
if (flags.f_and & MBOX)
{ 'm', CMBOX, MBOX, MBOX },
holdbit = autohold ? MPRESERVE : MBOX;
nohold = MBOX|MSAVED|MDELETED|MPRESERVE;
if (mp->m_flag & MBOX)
if (mp->m_flag & MBOX)
mp->m_flag &= ~(MPRESERVE | MSAVED | MBOX);