Yep. I had exactly the same problem and solved it the same way you did. I suspect it had something to do with either the 10.2.6 update (I used the combo version) or a recent period when the Apple servers were down for a short period, although I'm just guessing. John On Monday, May 26, 2003, at 03:08 PM, Preston Black wrote: > Yesterday I had an interesting problem with Mail.app. My .mac email > account just stopped working. I have another account and was getting > mail from it, but my .mac account was missing in action. > > I checked to see if I had taken it offline but I hadn't. I restarted > and my .mac account's mailbox was gone. I looked in Preferences and > noted that (inactive) was written next to my .mac account. I went to > the Advanced tab and checked make this account active. When I did this > I got an alert saying that I had to enter a username for this account. > I went back to the Account Information tab and noted several things. > First, Email address was empty as was the username. And they were both > grayed out so I could not enter information. Nothing I did would > change this situation. > > I solved the problem by removing this corrupt account and replacing it > with a new one. > > Has anyone else seen strange behavior like this?