When I login to my account a while ago there is a message saying.
"Sorry iammichael, you are banned from posting or sending personal messages on this forum.
You have been banned by a forum moderator. You may appeal here: banappeals-w6pquw43@theymos.e4ward.com"

I didn't received any warning before so I don't know why I got banned.
How can I remove this ban?