Roundcube pointing to Zoho

[maniekandan5]

Hi,
Im successfully installed roundcube on my server with zoho IMAP, all works fine.
I understood this roundcube is just a webclient as outlook etc.,

Just want to confirm,
1. whenever the user login here, i can see the user names stored on the database. Is it the password also stored inside?
2. If user open/read/send emails via roundcube interface, those emails will stored inside roundcube's database.
3. If "YES", considered those emails will occupy my server's space too.

[SKaero]

1. Not in the user table but the password is stored encrypted in the session table while a user is logged in so that Roundcube can connect to the IMAP server.
2. Not by default, if you turn on message caching the message headers (not the body or attachments) will be stored in the database for faster folder loading.
3. If caching is enabled the message headers in the database would take up some room but not much and it doesn't store all email so its not bad at all, and as I said it doesn't with the default configuration.