[Lilux-help] Notes .nsf to mbox?

Hi, @work, I have to work with (insert as many expletives as you like) Lotus Notes. Now, I'm wondering how to convert existing .nsf files to something a little bit more standard, like, say, mbox? This of course including such unimportant things like attachments. There's an export function in the Notes client that will generate something close enough to mbox, but without attachments - thus not usable. I'd love to be able to get the task done without going through the server, connecting through IMAP using a decent client etc, and what's more, on a Linux box... I've googled a bit, but the result so far has been very disappointing. Does anyone know any means to get this done? Greetings & TIA, Eric