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We currently run smarter mail which is ok but we want a lot more features. I have built a test Zimbra box and im impressed, we however relie a lot on email in the business and smarter mail can be back up and running in a short period of time when there is a server failure. What is the best way to backup and get Zimbra working quickily in a failure is it easy to have a backup server regualrly getting updated which could be used in a faliure ?
The Network edition allows you to take hot backups of your mail store and then restore from backup in case of disaster.
There is a pending enhancement request (bug 11423) for more efficient disaster recovery via server-to-server sync to an offsite hot backup. Please vote for it if you're interested!
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Backup Server 
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