Hello, I've been using Thunderbird for quite a long time now. I manage two private mail accounts, one at t-online and one at GMX, with Thunderbird. Suddenly, since yesterday I cannot longer get access to my GMX account. When opening Thunderbird, I first get a popup requesting to enter my password for the GMX account (normally I needn't do that). When I enter the (correct!!) password, it is not accepted, and I get an error notification (see attached screenshot). "Try again" also does not help. The t-online account I can operate in Thunderbird as usual. What can I do to again get access to my GMX account via Thunderbird? Thx and best regards Rainer