Using System Servers

Is it possible to use system servers (provided customer is allowed to use system servers from backend) for a specific campaign. While running the campaign from customer account I did not select the available delivery server and assumed that campaign would go from system server but it actually used the same customer delivery server which was not selected.

Is there a way I can force a campaign to use system server ?
@Sandeep Saxena Set in Backend > Settings > Customers > Servers and set "Can send from system servers" to Yes. Then you will be able to select servers in campaign, if in campaign settings is not selected a delivery server then all the available servers will be used.