# 1. stop j-chkmail services :
  service jchkmail stop
  # 2. migrate j-chkmail data :
  migrate-j-chkmail-2-ze-filter --op copy
  # 3. check if everything was done as expected
  # 4. compile and install ze-data (as in the old way...)
  # 5. check again if everything is fine...
  # 6. start ze-filter