Tinabeth1962 Said:
"I can’t get my yahoo mail thru mail app: I’ve been having this problem for a year! I can’t get mail thru mail app! It says can’t connect to server! I’ve been on with senior advisors and was told engineers know and are working with yahoo. It’s frustrating to know end!"
-------
Use a New App Password for Each Device:
Do you use an App Password? If so, try a new App Password. Create a unique one for each device. Remove the current one, and then use the new one instead. Sometimes, changes (i.e. updates) are made to the device, and then mail server syncing becomes an issue (which is what a new App Password it intended to fix).
Yahoo App Password Link: Generate and manage third-party app passwords | Account Help | Yahoo