[Dovecot] zlib plugin

[Luuk]

hi,

Could anyone give some info on this plugin?
When i read the wiki (http://wiki.dovecot.org/Plugins/Zlib) i'm still 
left with some questions...

I use Maildir to store my mails, if i enable this zlib-plugin,
should i 'manually' compress all messages?
or wil the uncompressed messages still be accessible by dovecot?
wil new messages be compressed automagically?

how should the compressed messages be named?
a message now has the name '1223224520.2783_1.opensuse:2,S'
how would a compressed message be named?
['1223224520.2783_1.opensuse:2,SZ' or '1223224520.2783_1.opensuse:2,S,Z' 
or ???]

Last but not least, what gain will i have by using this plugin in 
combination with Maildir, or will it have more impact when mails are 
stored in mbox.

-- 
Luuk 
$ dovecot --version
dovecot version 1.1.1
$ uname -srpmio
Linux 2.6.18.8-0.10-default x86_64 x86_64 x86_64 GNU/Linux