[s5806533]

Original author here. I have the following desiderata concerning MUA:

* it should be able to work offline (with a dedicated send/receive cycle),

* it should run fine on a Raspberry Pi (out of principle more than anything),

* it should favor plaintext mail,

* it should integrate well with all kinds of workflows and platforms (such as git email),

* it should be a veritable platform for experimentation (i.e., it should be malleable).

I think the case can be made that re-inventing the wheel can sometimes be beneficial. And e-mail to me seems rather 'underexposed' (maybe because most people think it has been a solved problem since at least Gmail).