I have an old account with .mac format addresses. I set up several subordinate e-mail addresses for my family members as .mac addresses. Then, .me came along. We have tried to use .me addresses, but cannot from the iMac when using Mail client software. The only other addresses that show up are .mac subordinate names. However, when on the internet, from other computers, using the browser mail, we can see both .me and .mac addresses. This is confusing to our friends, and potentially weird for the new cloud system. How in the world do I get rid of the ancient .mac addresses such that .me addresses show up in the Mail client?