my mail keeps geting deleted

First time it happened i posted about it and it was restored but i couldn't take anything out then server restarted and it was deleted again. Then multiple times after it was deleted from having what i assume to be too much mail. And finally it wont give me the money from AH sales on a good amount of them but not all when its supposed to then after a day or so it builds up in my mail box and deletes it all. about 95% of my mail is from the AH if that helps no idea whats wrong but i would appreciate any help i only play on Lordaeron thanks for your time.

Well keep it in the limits. You are not supposed to put 500 offers for 1 item or alike into the AH.