[stephenr]

Define "handled by others".

Installing an exchange server is arguably letting email be "handled by others" because you are not responsible for how it works, just the setup and monitoring, which could be handled by in-house staff or by a contractor.

My point is that "focus on the core competency" doesn't have to mean "make our company reliant on a dozen other SaaS businesses who may go offline or change their business model/functionality on a whim"