Hacking Mail Brick?

[Jitoku]

If you read the discussion I opened earlier, you should know that I’m working on a unbricking app that will help noobs. So I was trying to find all types of bricks and I found something called Mail Brick. As I understood, this type of bricks can be happened even if the Wii is not modded, and It is caused because of the corruption of mail. What corrupts it? Just a network error or a special letter that makes it corrupt or something else?I will maybe give credit to you in the app I’m working on if it’s enough and good.

 

[GodLLama]

That would be good if anyone answered this question properly, I would also like to know the reason.

 

[elenarguez]

I'm so sorry for refloating, but I had a brick like this....
It only happened when I was playing wii fit plus (channel too) or marbles saga kororinpa, when I returned to the menu of wii appeared that message... and I fixed it by starting maintenance mode and erased the saves. I've noticed that it only happens with games that are played with the wii balance board, in others not.
Is there a solution to this? I wouldn't like to format...