Google | Forvo | +
comp., MS split domain (A Simple Mail Transfer Protocol (SMTP) address space or domain suffix that is shared by two different messaging systems. For example, you may have to share the SMTP address space between Microsoft Exchange and a third-party e-mail system, or between Exchange environments that are configured in different Active Directory forests. In these scenarios, users in each e-mail system have the same domain suffix as part of their e-mail addresses)