Keep in mind that only (semi)motorways need Vignette in Switzerland, if you stick to secondary roads they are free:

Do You Need a Vignette to Enter Switzerland?

No — the vignette is not required to enter Switzerland, but it becomes mandatory as soon as you use a motorway. Technically, you can enter the country without a vignette if you stick to secondary roads.

However, be aware that many border crossings from France to Switzerland — such as Bardonnex, Vallorbe, or Basel Saint-Louis — lead directly onto motorway sections. In these cases, you must have the vignette before driving on those roads. (Source)

So if you are just cutting through briefly you might not need that detour.

Can I just drop it in and make it work with my current MailDir folders or do I need to do some migration work?

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