[Box Backup] Mailbox backup is dangerous.

[Tom Albers]

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Hi,

I just got bitten by a serious bug which has caused serious dataloss and I want to warn people for the same pitfall. 

Housekeeping removes files from the store based on the actual file date and not on the deletion time.

So, due to some reason my mail archive was deleted on my server. Each mail in the maildir has the date it arrived on the Cyrus mail server.

I then looked in the backup and restored the archive.  But it seems Housekeeping has cleaned up and deleted everything permanently up to september 2009. So I lost my archive from 1998 - september 2009. 

The only way to prevent this is to base the Housekeeping on the deletion date and not on the date of the file.

Best,

Tom Albers
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