But if you also want them off Thunderbird, use the extension " ImportExportTools NG", and export the "Z-archives" folder (probably in parts because it will be too big), choosing either "Export folder" or "Export folder and all its subfolders with their structure". If you want to take them off the server, you can keep them into "Local folders" as suggested above. If you want them on the web server and via Thunderbird, make sure "Z-archives" is synchronized. That way, these old messages will still be on the server but won't be accessible via Thunderbird they will only be accessible via webmail. But for ultimate performance, select "Account Parameters", "Synch and disk space", and make sure "Z-archives" is not synchronized in Thunderbird. Thunderbird should work a bit faster because the bulk of their profile will be in folders that don't change. If you keep on the server, your job is almost over. The strategy will now differ according to the final destination. In our organization, it means I keep on hand anything less than 1.5 years old and ship the rest to archives. I would suggest that for folders that are ultra large, you cut them like Inbox 2011-2015, Inbox 2015-2019, etc.ĭon't move current messages. If messages are really large, don't hesitate to keep the connection open all night! Move stuff, say, 500 messages at at time. Move all that you want to move from the regular overcrowded "Inbox" to similar folders that you will create under "Z-archives". To keep it locally (either in Thunderbird or outside of it), create it in "Local Folders". To keep on the server, create it under the account's hierarchy. How to do it (common for both strategies)Įither work in Thunderbird or via webmail, but make sure only one connection is open otherwise things will really be slow.Ĭreate an archival folder structure. – Moving out of the server and keeping these messages locally either in Thunderbird or even outside of it. – Saving on the server, but not in Thunderbird. None of these would require stopping the server, although it would be much faster if you use a fast connection (ex.: LAN rather than internet). If you/they need to keep a copy of these emails accessible, the following concepts should work. Then either delete hem or simply strip them of their attachments. If there is no requirement to keep all these emails, you could ask the user to search for messages that are older than XX years and larger than, say, 10 MB. If you make sure their Inbox and Outbox are small and that other non-moving folders are large, then compression will be much quicker. But the major "slowness" issue in Thunderbird is that your user's Inbox and Outbox are way too large and therefore automatic compression takes too much time. I don't know why your user has such an amount of mail, and what they use these emails for. Does anyone have any experience with a mailbox of this size in Thunderbird and, if so, possible how to remedy these issues? I'm about out of ideas to try and get this to work. Similarly, restructuring of the mailbox is not currently an option, much to my dismay, given the enormous amount of downtime that would be required to perform such a task. This user in particular is, for the time being, unable to migrate to a different email client-webmail or otherwise. Now, I'm well aware that when using Exchange, the best solution is to use Outlook. At the time of writing, I'm backing up the profile directory to prepare for this task.assuming I'm given the time of day to attempt it.Note: We have not attempted a full index rebuild (yet) Folders created in Thunderbird are synchronized to Exchange but not the other way around.Downloading new messages causes Thunderbird to hang, sometimes indefinitely.I'd expect this to be an indexing error given the size of the account, frankly.Thunderbird Version: 68.5.0 32-bit (stable).Current Thunderbird Profile Size: 96.0 GB.Migrate was solely to increase the mailbox size additional features such as calendaring are not important in this case.Our mail provider has a hard limit on IMAP/SMTP accounts of 25GB per mailbox - this user was exceeding this limit a little over a year ago, so we migrated them to hosted Exchange through the same provider which has an integrated IMAP interface.So, for some context, here's some figures for what's going on with this account: Unfortunately, I'm about out of ideas to try and get Thunderbird back to typical operation for this account. One of our "power users" has an inordinate amount of mail which cannot be pruned-which leads to an extremely large mailbox (and an even larger profile directory).
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