Create message via Calendar button hack in Priiloader. If you are unsure of how to do this, or do not have Priiloader installed, follow this guide.
Download the WiiLink Mail Patcher from the Open Shop Channel (if you don’t already have it), and extract the apps folder to the root of your SD Card.
Launch the WiiLink Mail Patcher from The Homebrew Channel and follow the on-screen instructions.

For people looking to use Demae Domino’s: Continue to linking your console to a WiiLink Account.
For everyone else: You are done! Enjoy using WiiLink to your heart’s content!
Please join the WiiLink Discord server, or the WiiLink Forum for support, you will need to have your Wii Number removed on the database side in order to remedy this issue.
The patcher is failing to connect to the internet. Ensure your console has an internet connection setup, and try again. Waiting for the connection to initialise in The Homebrew Channel (the WiFi icon in the bottom right going solid white) can help.
There is something wrong with your DNS setup. Ensure your DNS settings match the WiiLink DNS (167.235.229.36), or are set to auto-obtain.