The question is why, not whether the servers need to be more secure or not.
All three servers do not necessarily need to run on the same machine.
So the server needs to know who among all the people maybe purchasing things at the same time is saying yes.
Who can help you determine your server needs?
Less hardware needed, no server needs to be purchased.
A server used for sending and receiving email generally needs two services.
The problem with this method is that the server needs to transfer secure information to each of the receivers.
The server needs to get the manager or even talk to the chef.
After configuration, the server needs to be uploaded to the target and then started.
It might not matter, but the servers would need to be in the us right?