MS Teams - Couldn't resolve host name

[GetMeSomeCoffee]

Hello Zabbix community,
i'm currently facing an issue with setting up a connection with MS Teams. I'm running Zabbix 6.0 in a docker setup.
If I try to test my connection of teams, I' get the following error:

Sending failed: Error: cannot get URL: Couldn't resolve host name.

Please check out the attached screenshots for my configuration.
I could already verify that the frontend container can in fact reach the Teams environment by running

curl -H 'Content-Type: application/json' -d '{"text": "Hello from the Zabbix frontend"}' <Teams Webhook url goes here>

The server container logs aren't very informative either:
[ MS Teams Webhook ] ERROR: Error: cannot get URL: Couldn't resolve host name.
The frontend container log doesn't show anything.

I'm out of ideas why it's not working, maybe someone else had/has the same problem

[GetMeSomeCoffee]

Managed to track down the issue. The env variables with http proxy was not recognized correctly. Had to reset this and then it was possible

[GetMeSomeCoffee]

Managed to track down the issue. The env variables with http proxy was not recognized correctly. Had to reset this and then it was possible

[cindycallai]

Hi guys, I have the same problem "Sending failed: Error: cannot get URL: Couldn't resolve host name.", but I have to configure zabbix with Discord via Webhook.
can you help me?