Mailgateway on LXC, proper DNS settings

Hi,

I'm trying to install and setup PMG for my personal hosting, and I need a little help with DNS settings

Actual: a VPS with Virtualmin, DNS on cloudflare.
Wanted: PMG lxc on PVE, Vitrtualmin VM on PVE.

Now I have all of the cloudflare (external) DNS pointing to the VPS:
mail
smtp
imap
www
...


If I want to setup PMG lxc on PVE, Vitrtualmin VM on PVE, I will need to point all of the external DNS to my external IP, then port-forward them to
mail -> pmg
smtp, imap, www, ... -> virtualmin...

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