In the era of rampant instant messaging software, email has not lost its place due to its characteristics of privacy, stability, and storability. On the contrary, it has become even more important. Domestic portal sites also spare no effort in promoting their free email services to increase the stickiness of their websites. However, in the situation where free email services are widespread, why do paid email services still exist? There must be a reason for their existence, and naturally, there are differences. To put it simply, you get what you pay for. The difference between VIP paid email and free email lies in the security, reliability, and other additional services of the VIP email. Here, I will make a comparison between them, hoping that this article can serve as a reference for those who are about to purchase a VIP email service.