[exim] Names of Maildir files

Hi!

I need to know if Exim v4 can change the default names of files in Maildir
folder (time.pid.host). I would like to use Exim ID as name of these files
in Maildir folder.

I have manually change the name of some files in this folder (cur, new...)
to other name and IMAP and POP server works ok, but... How I can do it with
Exim (not manually)?

Thanks!

Israel.