openssl s_client -CAfile /etc/pki/tls/certs/cacert.pem -connect 
redacted.fqdn:143

bit depth of the certificate is 4096. Bit depth of the root ca is 4096, no 
intermediate ca here.

ssl_cipher_list = PROFILE=SYSTEM

update-crypto-policies --show

DEFAULT:DISABLE-MY-WEAK

the MY-WEAK is:

cipher = -CHACHA20-POLY1305
mac@SSH = -HMAC-SHA1 -UMAC-128
etm@SSH = DISABLE_ETM
group = -SECP521R1

But with DEFAULT only it is the same result.

On:

grep -E "params size|TLS protocols" /usr/share/crypto-policies/policies/*.pol

it seems I am fullfilling all the requirements.

Could it be dovecot is not loading the certificate at all?

Marek



Odoslané pomocou bezpečného emailu Proton Mail.

štvrtok 20. novembra 2025, 17:04, pgnd <[email protected]> napísal/a:

> > When trying openssl s_client to port 143
> 
> 
> show the command you're using
> 
> 
> 
> what's the bit-depth of your self-signed cert?
> 
> 
> 
> you are forcing `ssl_cipher_list = PROFILE=SYSTEM`
> 
> on that system, what's the output of
> 
> update-crypto-policies --show
> 
> ?
> 
> check whatever policy your system's got defined
> 
> grep -E "params size|TLS protocols" /usr/share/crypto-policies/policies/*.pol
> 
> for minimum param size reqt's
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