[Users] How to save emails to and open from disk?

[Paul]

On Thu, 26 Oct 2017 11:47:34 +0200
Ralf Hutter <rhutter at posteo.de> wrote: 

> i can't open an email that i've saved to disk (Ctrl + S). What do i
> have to do? Do i have to save it to a special format?

it's just a simple text file.

with regards

Paul