mailcow not working

[Boxieeee]

setup 3 times exactly like it says in mailcow and like you have described.
using local only

made it in proxmox vm ubuntu 22 server

hostname mail.kk.local
fqdn put mail.kk.local

up -d

unbound error

SKIP_UNBOUND_HEALTHCHECK=y

in your mailcow.conf

now runs
in ui make domain kk.local

user test.kk.local

sogo login no inboxes

i am accessing it from another computer on the network

[Jniklas2]

Then something in your network is blocking the resolving of some domains. Have you any kind of firewall in front of that server, that filters/redirect dns outgoing?