Re: Thunderbird can't connect to Dovecot (bad certificate: SSL alert number 42)

Hello.

Am 14.09.2022 um 13:59 schrieb Christian Mack:

Sound to me, as if Thunderbird does not know the CA used to (self) sign that server certificate.

Following the documentation at

https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-cert...

I configured

ssl_cert = </etc/letsencrypt/live/...../fullchain.pem ssl_key = </etc/letsencrypt/live/...../privkey.pem

to my Let's Encrypt SSL certificates and did a restart of Dovecont and at least for one installation of Thunderbird it seems to work again now. For the other installations I need to check later at home, but the problem seems to be resolved.

Regards,

Meikel