How to move some of the items from the vertical menu to the second column?

Question

Mail server

There is such a menu
. It is necessary that 4 items be displayed in the first column, and the remaining two in the 2nd column.

Answer 1

See the firewall on Mikrotik and port forwarding.
As an option - are the ports forwarded there, are the correct IP addresses registered.
In theory, there are no other options.
Also masquerading settings.
The incoming traffic is obviously cut. Or your equipment or the provider's equipment.

Answer 2

codepen.io/anon/pen/aOWadK
For all items, starting from the fifth, we make an indent on the left equal to the width of the menu:

.menu li:nth-child(n+5){
    margin-left: 215px;
}

The fifth item is dragged up using a negative margin (the value depends on the height of the first column)

.menu li:nth-child(5){
    margin-top: -108px;
}