Export Kmail into Thunderbird
Importing mail from Kmail into Thunderbird can be a huge pain. It took some searching and reading some blogs that were not very well worded to figure this out. And even then I had to play around a bit. The main problem is that Thunderbird uses mbox format to store emails and kmail, by default, creates all of your folders and subfolders in the maildir format. First thing first, make sure you have Thunderbird installed and setup with your email conneciton settings. Then lets go ahead and get 2 file manager windows open. One should be open to your Kmail folder that stores all your emails. These can be a multitude of directories depending on the install. On my opensuse box it was in: /home/username/.kde/share/apps/kmail/mail/ on other systems it may be in ~/Mail/ or ~/.Mail/. The other window should have your Thunderbird mail folder open. This is generally in ~/.thunderbird/[randomstuff].default/Mail. Generally speaking most people store their Thunderbird emails in the following directory, /home/username/.thunderbird/kjc1e1t2.default/Mail/Local Folders/.
