Home » Kerio User Forums » Kerio Connect » Archiving a emornous mailbox (300K messages)

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Hi all,

Have inherited a Kerio Connect server v7.2.3 on OSX 10.4 that is in disparate need of some tuning. Obviously both the OS and Kerio version need to be upgraded. However, the problem is that one mailbox have been set up to archive email (using "Remote Address" feature) and is about 230GB & 300,000 items(!)

Ideally we will move the server to a new machine, but probably best to do without this massive user account containing the mail archive as 1 kerio backups around 380GB total. Also will upgrade to latest Kerio version when server OS can allow this.

How would you fellow users recommend to archive this mailbox as safely as possible? (boss wants to keep the email archive in case we need it to refer it for contracts, etc).

I am thinking to maybe delete the user, then restore (from backup) the archive mailbox datas to another temporary server to archive off the mail? Or maybe to download with IMAP/POP and delete that way?

If deleting the user mailbox, does domain's "Deleted Items Recovery" keep this data in the server for 30/x days or is removed immediately?

Any suggestion much appreciation.


[Updated on: Mon, 02 March 2015 16:40]

Bud Durland

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First, I would set up archiving to to use archive folders, rolled over at an appropriate interval.

The, use the web administrator to delete the big archive user, but do not remove the message folder from the server. Now use your favorite backup / zipping utility to copy the big archive box somewhere else. When that is done and verified, remove the folder from the Kerio mail store.

Now migrate to your new server using the appropriate tools. Unzip the monster mail box to the new server, and recreate the exact same user name in the admin utility. Ta-Da.

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Thankyou Bud, this sounds good.

Once the archive user is removed from Kerio user list, is it safe to do the zip/backup without stopping Kerio? And the delete too?

Have a strange problem where the System Preference just says "Could not stop Kerio connect"
Seems not just me.. forums.kerio.com/t/19969/can-t-stop-kerio-server-7-2-

But maybe hard to do if the server won't stop - will try it straight after restart and hope for luck.

thanks again very much.

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I recently moved from one MacMini (OS 10.7 I guess) to another (OS 10.10). Both MacMinis used a large SSD for storage - SSD provides fast access to everything. I used the Kerio backup feature and it worked well. Got about 500-600GB mailstorage at all.

I suggest that you set up the new machine and then try to import the full backup so everything should be the same on the new machine then on the old one. After moving you can think about what to do with the large mailbox - the SSD speed should help in any way!


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Indeed, once you delete the user (leaving the store!), it's fine to zip or backup that user's folder with the server running. In no way would the server touch that folder.

The issue you are experiencing with the inability to stop the server was indeed quite prevalent in Kerio Connect 7.2.3. It is fixed and much better in the latest 8.4.x version.

With that said, you do need to stop your server from time to time... before upgrading.

I would try to stop it during non-peak hours.... late at night perhaps. If that doesn't work, try the command:

sudo /usr/local/kerio/mailserver/KerioMailServer stop

Note, even then stopping can take _awhile_.

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