No email access from internal network

[mrmarkuz (Markus Neuberger)]

Please check /var/log/firewall.log for errors/blocks.

You may disable the firewall to check if it’s the cause:

Powerchute service

I can’t reproduce the issue. After creating a service (like you did), I can access powerchute via https://NethIP:6547. You may try to disable the firewall to check if it’s really the cause of the problem: shorewall clear Enable firewall again after testing: signal-event firewall-adjust

Do you use IPS or Threat Shield? A wrong rule or list could be the issue…