many large providers use CDNs or similar structures, which results in
the same FQDN being resolved to different IPs.
Afaik the Qube-Firewall-Settings resolve a DNS entry only once (on
add/edit) and internaly use that IP. This is a problem with my
mail-provider (web.de) as well es for Updates of Thunderbird Add-Ons.
Besides workarounds like manually refreshing the firewall settings or
temporary allowing full web access: is there a fix for these issues?