To answer this question, you need to understand the concept of mail services.
Option A) True - This option is incorrect because mail services are not limited to running only one kind of system. There are multiple types of mail services available, such as Microsoft Exchange, Gmail, Yahoo Mail, etc., which can run on different systems.
Option B) False - This option is correct because mail services can run on different kinds of systems. For example, Microsoft Exchange can run on Windows servers, while Gmail can run on Google's infrastructure.
The correct answer is B) False. This option is correct because mail services are not limited to running only one kind of system.