I have a question about using email in Zimbra.

We are a small company (4 users) sharing 3 email account from different locations, we receive around 90 mails a day on every account and we don’t want to manage the box
by redirecting the mail to personal mail boxes but from the central box.

My question is if its possible for the users to see with e-mails are answered, e.g. to ‘share’ email folders across groups?

thx for yor input,