Apple and Comcast can't get it together

Went to a Dahlia Society website, clicked on an officers e-mail for information and suddenly got a message saying in part that 'junk mailbox is currently locked by "null" on host so and so. Locked all mail stuff up, had to shut machine down as the stuff wouldn't go away. Call Comcast, and after half an hour "it's an Apple problem". Then to Apple and an hour and a half later, "it's a Comcast problem. Them Comcast where they changed my e-mail so I have to go to their site to get mail. Have to go back to Apple because now I don't have Apple mail anymore. Nobody knows what happened, I can't hear on the phone so my patient wife has to intercede. Four and a half hours on the phone and it is still screwed up. At least I can still get DG, so who needs e-mail. All after clicking to an email.