is a self signed certificate always invalid the first time?

[Florian Beer]

On 2017-08-11 11:36, Michael Felt wrote:
> I have looked at let's encrypt. Key issue for me is having to add a
> lot python stuff that would otherwise not be on any server.


I use acme.sh for all of my LetsEncrypt certs (web & mail), it is 
written in pure shell script, so no python dependencies.
https://github.com/Neilpang/acme.sh