is a self signed certificate always invalid the first time?

[Ralph Seichter]

On 09.08.2017 17:49, Alef Veld wrote:

> I think let’s encrypt uses certbot though and it can’t do email
> certificates (although i’m sure i can convert the cert i get from
> let’s encrypt, i’ll look into it.

I'm not sure what you mean by "can’t do email certificates"? In any
case, Let's Encrypt issues certificates that can be used by Dovecot
for IMAP and simultaneously by Apache or nginx for HTTPS and Postfix
for SMTP. The certificates are issued for servers, not for specific
software or protocols.

-Ralph