I have an @rogers.com email account and a few @yahoo.ca accounts, and have trouble setting them in Thunderbird for Android. Rogers uses Yahoo servers for mail access but has its own servers for authentication. Ever since I first tried to set up my Rogers email account, Thunderbird has been sending me straight to the Rogers authentication page (rogersmembercentre.com) instead of the Yahoo page, regardless of whether the account that I am trying to set up is a Rrogers email or a Yahoo email (I tried both @yahoo.ca and @yahoo.com, and even @yahoo.pl). Rogers then asks me to enter my email address again, and rejects it because it's not an @rogers.com address. Before the first time I added a Rogers account, I'm pretty sure I had seen it work correctly: I entered my Yahoo email, Thunderbird asked me to confirm Yahoo's servers and port numbers, then sent me to the Yahoo authentication page, where I entered my password and there was no problem. But it seems that the association of Yahoo mail server with the Rogers OAuth server got stuck somewhere, and I can't get it unstuck. Even if I delete Thunderbird's data and/or uninstall it and reinstall it, it still sends me to the Rogers page when I try to add a Yahoo email account. I guess this means that it's cached somewhere outside the Thunderbird app, maybe in some system cache of my phone, and it's possible that it's not a Thunderbird bug but an Android bug?