Back when, up to version 5.0.14, I had access to Yahoo accounts via IMAP. It was great. I have one Yahoo account and my wife has 3.

When I upgraded to 5.0.18 and it stopped working. Filed a bug report, but it was obvious that only a few of us saw this issue.

So now I finally had time to upgrade to 6.0.4, which is great BTW, but the problem is still there.

I am SURE that it is something that changed/got whacked during the upgrade to 5.0.18 that the subsequent upgrades don't change, assuming that it is a chosen setting. But what?

Does anyone have the slightest clue where to start?