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This is absolutely horrifying. I'm using Ubuntu 12.04 and I just found out my .thunderbird folder under my user home directory is 7.4 Gigabytes... However I'm pretty sure I'm using IMAP for all my email accounts, so why is it so huge? And what should I do? Can I just delete the .thunderbird folder?

Thank you so much for help!!

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migrated from stackoverflow.com Oct 27 '12 at 1:45

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2 Answers

It is probably cache and emails you read, thunderbird needs to download them for you to read, even if you use IMAP. You can start by cleaning the cache: http://www.techiecorner.com/1737/how-to-clear-thunderbird-imap-cache/

Or you can use compacting: http://kb.mozillazine.org/Compacting_folders

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It seems that you are storing all your emails and attachments (7.4 GB of them). By default, thunderbird downloads all emails and mirrors them locally. If you delete some of the bigger emails in the cache, this will decrease the size of your thunderbird directory.

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