It is not the first time I use KDE, actually my first steps with GNU / Linux they were about debian-etch with KDE 3.x, and one of the applications that I like the most about this Desktop Environment es kmail your mail client.
The thing is, I've always used Thunderbird with an account POP and I needed to get all my emails to kmail. The process is really easy and the end result is splendid. How do we do it?
1- We open kmail and set up our account.
2- Once this step is finished, we will File »Import Messages. There we select the option: Import emails and folder structure from Thunderbird / Mozilla.
3- We go to the next step by clicking on: Next and automatically the wizard detects the folder .thunderbird our / Home. We can select the complete folder, or we can go searching until we find the folder Email.
4- The wizard begins to copy all the messages and their corresponding folders to a new folder. We wait for it to finish and that's it. We will only have to organize and move the folders in kmail.
This wizard also has other very interesting options, such as:
- Import files mbox.
- Import from OS X.
- Import from Opera.
- Import from Sylpheed.
- Import from Outlook Express.