Can anyone help me to setup following features in Zimbra Collaboration Suite Server v8.0.2-

Mail Message Recall - Ability to unsend / Recall a sent mail

Incoming E-Mail to text conversion for some particular ID's & save them in .txt file.

Reverting / restoring a mailbox after deleting the user.

mail outgoing & incoming should not be stopped even after provided mailbox quota is reached. Only an over quota warning message will be displayed to the user after each incoming & outgoing mails.

--- The client is using Lotus Domino 8.5, planning to migrate to ZCS v8.0.2. They require these features to be present.