M_CHECKUDB
if (bitnset(M_CHECKUDB, e->e_from.q_mailer->m_flags))
setbitn(M_CHECKUDB, LocalMailer->m_flags);
if (bitnset(M_CHECKUDB, m->m_flags) && *p == '@')
bitnset(M_CHECKUDB, m->m_flags))