I have been losing my emails for a long time. How do I save emails in Zimbra? 

To prevent email loss in Zimbra, a reliable cloud information archiving solution like Vaultastic, can securely protect 100% of your email data. 

Vaultastic’s robust cloud archiving platform, preserves all emails  independent of any actions taken in the email client. Even if users accidentally or intentionally delete emails, you can rest assured that they are safely stored in the archive and easily retrievable when needed.