View-only of old Maildir files

People,

After a very long time I have had to stop running my own mail server and 
now use an off-site service - but I will need to continually get access 
to all the old emails on my own server - so I need a read-only mutt to 
view them.  So far I have this in my .muttrc:

set mbox_type=Maildir
set folder="~/Maildir"
set mask="!^\\.[^.]"
set mbox="~/Maildir"
set record="+.Sent"
set postponed="+.Drafts"
set spoolfile="~/Maildir"
set imap_user = "phr"
mailboxes `find ~/Maildir/ -type d -name cur -printf '%h\n'| sort | grep 
-v '/home/phr/Maildir/.Spam$' | tr "\n" " "`
set read_only=yes

but after lots of messing around I still can't see any of the 3000+ 
subdirectories under Maildir . .

Suggestions appreciated!

Thanks,

Phil.
-- 
PO Box 896
Cowra  NSW  2796
Australia