On 12/10/2021 10:36, Jerry Malcolm wrote:
> Benoit,
>
> I was thrilled to see the option for creating a direct keystore
> without having to go through the every-3-month LetsEncrypt and the
> manual commands to create the keystore file.  But as soon as I put the
> new keystore file in and tried to send an email, Thunderbird told me
> that the certificate was bad since it was self-signed and no
> 'reputable' business would ask the user for an exception to a
> certificate, and I needed to  'fix my configuration'.
Correct.

Self signed certificates could be bypassed in thunderbird configuration
as far as I know.
>
> Ok, I know it's self-signed.  I think I already know the answer to
> this question.... but just confirming.  Is there anything else I can
> do to make Thunderbird and other email clients accept this cert?  Or
> is it back to LetsEncrypt and the continuous 3 month renewal process?
Yes very likely.
>
> Just out of curiosity, if indeed email clients are not going to like
> the self-signed, in what situations is it a useful cert?

TLS is useful for encryption though self signed certificate do not allow
to identify the server they are still useful.

>
>
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