Lathera

Mail addons like postal have an "open all" option, which is great for opening auction house and alt mail. But, I've heard of C.O.D. scams where someone will send people cheap items with a high C.O.D amount. My question is if I was to 'open all' with one of these addons would it open that C.O.D. mail, and if so do you know of any addon or any way to make an exception to "open all except C.O.D."? Thanks in advance.