[Dovecot] How to let people change their password ?

Hi,

I would like to know what do you use to let people change their email password ? I have a dedicated server with postfix and dovecot on it for a couple of web sites and I need to be able to let them change their mail password ... but I havent found any documentation on that :(

If you have any feedbacks, tutorials, website, ... let me know ;)

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.''. Edi Stojicevic : :' : Debian GNU/Linux user, admin & developer - http://www.debian.org . ~' French speaking Debian website founder - http://www.debianworld.org - GPG Key Id : 0x1237B032