Mail app not working

the mail app is having issues connecting to the servers or internet or something. My internet connection where i'm at works fine. All 3 accounts say there is a server timeout.

Mail.app worked fine a week ago when i was down at school and i haven't changed anything software wise since I got back back home. i'm exclusively on a wireless connection now where down at school i was on ethernet and wireless without any issues.

I tried deleting the plist file but that did not work. i checked the firewall and it is allowing connections for mail. I used OnyX to do some maintenance to see if that would help since i saw the suggestion in another thread but it did not work.

Anyone have any ideas to whats wrong or any suggestions that might help fix it?

my mac is in my sig and all software is up to date.

thanks

 

Nobody has any ideas, huh? I really want to avoid doing a reinstall of the OS. I made another account and that did not work either.

Thanks

 

The settings change is possible but its not just my school account. It's also my AOL and Mobile Me accounts. My next step is to try an alternative mail app but is not a huge issue since I can check via their respective web sites. Its just annoying that it worked one week and not the other.

Thanks for the help.