Thunderbird provides the ability to archive messages - that is, to move messages from their current folder into a dedicated archive folder. This makes it easy to keep the Inbox and other folders clean. The archive can reside either in your account's mailbox (in the case of imap accounts, this includes on the mail server), or in a local folder. Using a local folder will help you from reaching your mail server's quota limit. Archived messages are still indexed by Thunderbird's search.
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How do I archive my messages?
Messages can only be archived manually, not automatically. To archive one or more messages, select the desired messages and then click on the A on your keyboard. It is recommended that you not select more than 2,000 messages at a time.
button, or simply press
How do I configure archiving?
Configure archive location
The location of archived messages is configured individually for each email account. Click the Thunderbird menu button
and choose . On the accounts pane, click Copies & Folders under the desired email account in the left panel. In the Message Archives section, use the settings in Keep message archives in to set the location of the archive (either in your account's mailbox or in a local folder) or to disable the feature altogether.
Configure archive folder structure
You can define the structure of the archive folder by clicking the
button in the Message Archives section. There you can choose if you want to keep all your archived messages within a single folder, or file them into yearly or monthly subfolders. It's also possible to keep the original folder structure of your messages when they get archived.Multiple identities per account
If you have set up additional identities for an email account, the archiving location and folder structure can be configured separately for each identity.