I'm glad I found this thread. This has been driving me nuts for 3-4 weeks now. None of the email will come in, and then suddenly it all appears. I've wiped my phone, installed 11.3, uninstalled 11.3, wiped my phone, reset my yahoo mail password, basically gone through every step I can to see if there was a resolution. I don't want to use their crappy app and much like others, I've used/had this address for 2 decades, so changing it would be time consuming. I just don't get what changed and broke this.