Config has
        ssl_verify_client_cert = no
What options might have the client auth turned on?

TYIA

On 5/24/20 6:40 PM, Felipe Gasper wrote:
 From what I can tell, “SSL alert number 42” means that you’ve configured 
Dovecot to require client authentication.

Otherwise, your Let’s Encrypt certificate (with its authority chain) should 
suffice.

-FG

On May 24, 2020, at 5:45 PM, hanas...@gmail.com wrote:

Hello all,

What are the instructions for making an SSL cert for Dovecot IMAPS?

Two methods have been tried, and work, with Evolution; however generate the 
following error when Thunderbird tries to connect.

Thank you,

method 1 : self signed
openssl req -newkey rsa:4096 -sha512 -x509 -days 365 -nodes -keyout mykey.key 
-out mycert.pem

method 2 : Let's Encrypt (LE) CA
Created with Certbot

ERROR
TLS handshaking: SSL_accept() failed: error:14094412:SSL 
routines:ssl3_read_bytes:sslv3 alert bad certificate: SSL alert number 42, 
session=<+oooooo>
<hanasaki.vcf>

<<attachment: hanasaki.vcf>>

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