Mqtt on proxmox

Hey there,

I’m trying my best to talk as better as I can english, so apologize for yours eyes…

i have tried to create a MQTT wm to use it with Hass.

I think i have done well :

. Creating VM
. Creating User and Password.
. Testing Communication ( using twice terminal )
. Creating a letsencrypt certifcate with certbot on duckdns
. Creating an autorenew
. At finish configuration i have had systemctl mosquitto status running without errors.
. Opening port on router 1884/8883/8083/1883

What i’m not sure :
I have created a configuration.yaml for the brocker :

I don’t know if it’s a problem to created two domain on one duckdns.
I have mydomain.duckdns.org
mydomainmqtt.duckdns.org

mqtt:
 broker: mydomainmqtt.duckdns.org
 port: "8883"

I have created an user ( not admin ), and a password.

logins:
  - username: siegfrieds_mqtt
    password: mystronguestpassword
anonymous: false
customize:
  active: false
  folder: mosquitto
certfile: fullchain.pem
keyfile: privkey.pem
require_certificate: true

And then when i’m going to integration.
I put mydomainmqtt.duckdns.org
port 8883
thenewuser created
and hispassword.

And it won’t works.

Thanks for reading, and help…
Have a good evening all :).