Wow, learn something new every day. I never knew there were restrictions on mailing magnets. As many swaps as I've hosted and received, many with magnets, never had an issue, but I was going to host one for magnets then someone asked about the mailing restrictions. Didn't know until I looked it up.
Just wanted to share that with others too. Apparently there are strict limitations about mailing anything magnetized. Had to cancel my magnetic personality swap.