I am on an Intel Dual Core 2 Duo 17 inch imac running OS X Version 10.6.8. I connect to server/internet modem wirelessly. Monday morning mac mail started acting weird. It says mail is offline, but won't go online when I click the "Take all accounts online" option. I have wi-fi, I have internet (Firefox), diagnostics says "You appear to be connected to the internet" but I have to quit and relaunch Mail each time I want to send or receive mail. I have 2 mail accounts listed (work is an AOL, personal is Optimum online). When I launch Mail, it automatically opens the second account, my personal one. I've checked the preferences and can't see where the problem might be. I also have a PC on my desk and I can open my AOL mail there with no problem. Any suggestions?