I have used email service with my own domain for several years. Gandi.net were chosen as my domain registrar, not only because its low fees, but also its free mailbox service. However, since the middle of this year, Gandi.net has announced their price increment and would cancel all free mailbox service in the end of November. Although it is a controversial decision, I have no choice but to find an alternative mail service as soon as possible. As I also own some always free instance of Oracle Cloud Computer, why not set up my own selfhosted mail service? So do I, and in this blog, I will share how to set up one selfhosted mail server securely and freely, yet without any fee.