Is there a simple way to filter all calendar related e-mail in Zimbra to go to a separate folder? Some users prefer to keep their calendar things separate from their inboxes.

For example, searching for "is:invite" then saving that search is a good way to look at your calendar items. Is there a way to construct a corresponding mail filter?

On a related note, how can one suppress e-mails generated by accepts and rejects? There are situations when someone will want to invite the whole company in order to announce an event, but not necessarily care about whether they accept or reject the invite, in which case they don't want 100 e-mails.