You did well. I have been trying to contact Yahoo and get an answer to a lot of questions for years now. All I get are automated replies that are only notable for their incompleteness and confusing nature. One day I might get a human, but I am not holding my breath.

I also googled the issue and saw that some folk in yahoo forums reported changing the user name from [email protected] to just email in account settings worked for them. Others suggested that the Yahoo Account Key had to be turned off. Both of these things are logical. If Yahoo are changing how usernames are entered for pop mail and the account key sounds like a very likely culprit for breaking things other that web site pages, especially as one must have a yahoo "app" on a mobile device to activate it.

I could not read a reply from yahoo to their support threads as there were as usual none.

Yahoo forum I consulted here

Matt,

Thank you for your reply.

I am using imap as the server type for my Thunderbird email. And, my user name is my [email protected] email address. I don't know how I can change these setups to accommodate any of the suggestions listed in your message. I am using the Mac OS.

I appreciate your input.

You mention...All of my old emails and folders are missing. Right click on 'imap mail account' in folder pane and select 'Subscribe' You need to select all the required folders and click on 'Subscribe' click on OK

Did this get the folders back ?

Thank you for your response.

I am using Thunderbird on my MacBook Apple OS. I cannot right click with my mouse.

I am missing all of my emails plus my folders.

Can you offer any additional advice for me?

jcampion said

I am using Thunderbird on my MacBook Apple OS. I cannot right click with my mouse.

Then command click.