Zimbra is an email server solution open source software. Zimbra is easily manageable and open source mail server, Zimbra has Email, Calendar, Documents, Chat and a lot of other features. You can use a web-based email client or configure on any Mobile / Desktop client like Outlook, Thunderbird or Apple Mail. After Zimbra configure you can get below feature: amavis Also, I set configure email and spamming Security and backup and restoration strategy (Depend on Package). For more information about me check: https://www.serverkaka.com/