I second that.
Verzonden vanaf mijn Sony Xperia™-smartphone
---- Maarten schreef ----
>I'm using letsencrypt certificates with roundcube and I'm not having any
>issues.
>
>
>On 03/01/2018 07:49 PM, ɹןʇnqן wrote:
>> On Mar 1, 2018, at 09:21, NederHost/Sebastiaan Hoogeveen
>> <s.hoogev...@nederhost.nl> wrote:
>>> The 'SSL alert number 48' indicates that the server certificate cannot be
>>> verified due to being issued by an unknown CA. This is probably caused by a
>>> missing, outdated or improperly configured CA bundle on the machine running
>>> Roundcube. You should be able to reproduce the problem with openssl
>>> s_client from that machine.
>> It appears that roundcube doesn't like Let's Encrypt in a way that neither
>> dovecot nor postfix (nor any of several MUAs) have an issue with
>>
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