One of our clients wants to setup a dedicated server, but they want to, put a software for restricting certain users from sending mails to users outside the domain. But these users should be able to receive mails from any email id.
The reason behind this particular requirement is because certain users may be travelling and they wont be in the intranet .Otherwise we could have used an exchange server in the intranet.
Cpanel doesnot have such a feature. Can anyone suggest something that can be done here.