There is no DH key implemented by the TLS code in qmail-remote. The DH key in /var/qmail/control is only used by qmail-smtp (incoming). What I've read seems to indicate that and adjustment needs to be made to openssl itself in /etc/pki/tls/openssl.cnf

From here:

https://github.com/louislam/uptime-kuma/issues/1331

and here:

https://stackoverflow.com/questions/36417224/openssl-dh-key-too-small-error

Set

|CipherString = DEFAULT@SECLEVEL=1 |

On 2/21/2023 6:23 AM, Andreas wrote:
TLS connect failed: error:141A318A:SSL routines:tls_process_ske_dhe:dh key too small

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