This common, secure environment for software execution will utilize advanced hardware security coupled with industry standard software interfaces, such as those from the GlobalPlatform industry association.
Even experienced traders who would agree that factors such as the size and type of the transaction, the market for the security, and the speed and certainty of execution, are all relevant, would disagree as to the exact meaning of the term.
The result of moving email marketing in-house is more control of security standards, less risk of malicious targeting by hackers and access to more data for email execution.