How come the WiiMail services don't work through Dolphin?

I will note that I am using a legitimate NAND from my Wii U, which has been converted from a vWii to the original Wii OS. I have a mail address attached to the NAND, showing its legitimacy, but is something preventing Dolphin and standard Wii consoles from interacting with each other through its services?

This may have been answered through Discord, but I was wondering if I could get an answer.

Yeah I can answer this. Wii Mail still isn’t fully implemented into Dolphin. At present, only receiving mail is implemented. So you can receive mail from consoles that are already registered on the NAND dump, but you can’t register more consoles, or send mail from Dolphin.