I am running ISPConfig3 with Postfix and Dovecot. We have approx 1000 email accounts. We host email for clients and need a good way to continually backup email. Basically we need backup of all incoming and if possible outgoing emails. So it would be like making a copy of all email but not deleting email if it is deleted in their mailbox. This would all need to be compressed somehow. Our current backup solution is StorageCraft and even though I run 15 minute backups it deletes files when it needs to so unless we knew exactly when mail came in and or was deleted it makes it very difficult. Plus a lot can happen in 15 minutes. Email can come and be deleted and never make it to the backup. The other issue is StorageCraft likes to randomly crash the server. It has to do with the fact that it does a snapshot and the snapshot is not fast which causes the kernel to panic from time to time. Anyone have a good solution for something like this?