Cant Server Transfer. Need Mail-box Emptied.

Hello, my main character is on Mal-ganis and i have been trying to get him a server transfer. He was receiving spam from people advertising fake WoW beta promotions and phishing for my account information, so i reported them as spam which seemed to delete them from my mailbox. apparently i was wrong because whenever i try to switch my character over it gives me an error saying i have mail in my inbox. So i would appreciate it if a GM could delete the inbox of Skelleg on Mal-ganis server so i can server transfer.