Is anyone else experiencing slow down of mail being sent in Lion? It's taken around 25 minutes to send a 5mb file. It's uploading at between zero and 12KB/s according to mail itself. That's pretty poor. This same file is sent in mere seconds in Snow Leopard. Receiving is okay. I've checked all normal things like my upload rate and its all okay, I only have slow down on mail in Lion. Any ideas?