LaunchHostCorrection w/good password?! Mac


New Email
OK...Yahoo works beautifully all the time on my main account that I've had for years. But on my new accounts, and only on my Mac, I get this message whenever I try to sign in:

The error, LaunchHostCorrection, occurred when trying to connect to Yahoo! Mail.

It seems totally bizzarre and random...why should I be able to sign in on one account and not the other, or be able to on my PC, but not my Mac? And it's not my password... I triple checked that. Please help! Thanks