Exim question: tidy_db

[Jan-Peter Koopmann]

Hi,

I noticed an error on

http://www.sng.ecs.soton.ac.uk/mailscanner/install/exim.shtml

In Exim 4 this should not read 

defer_router:
      driver = dnslookup
      self = defer
      transport = remote_smtp
      route_list = "*  127.0.0.1  byname"
      verify = false

Since route_list is only supported for driver = manualroute AFAIK...

The intruction then goes on and recommends running

  exim_tidydb -t 0m /var/spool/exim_incoming retry >/dev/null

1. I do not have a db there yet.
2. Why do I need to do this? Does Exim not maintain this on its own?
3. Why do I not need to do this for the outgoing spool dir?

Thanks,
  JP