I do not like the new BT arrangement to access my emails. I want to reverse the BT page to BT Yahoo because it was much quick.

You're asking in the Yahoo mail category. Are you unable to access Yahoo mail or BT mail?
If it's BT mail, and you've switched from BT, you're likely out of luck as you would no longer have authorization to access their servers, as those would be restricted to BT servers. This is why independent email services (such as Hotmail, Gmail and Yahoo mail) are nice - they're not tied to any one internet company and can follow you no matter how many times you switch.

Violet,
Try accessing your mail with your mail settings on a different device, to make sure the account is not hacked.
Keep track of all your accounts, passwords and return addresses you connect to your accounts, so the provider can send you an email, when you have any trouble with one of your accounts.

Hi
BT have now transferred emails from what used to be known as BTYahoo and is now known as BTMail. If you go to the log in page here:
Email Login Page
then you can enter your email address and underneath the password box is a link "Forgotten password". If you click on this (the word "password"), you will be taken to a page to enter your username (email address). Clicking continue will put a green tick against the email address and you will then be taken to a page where you can choose how to receive a password reset email (probably not a good idea unless you have a second email address that is not a BT one) or a password reset text message to a mobile phone.
If you no longer have access to any email or appropriate phone then I am afraid you will have to brave the BT phone system so that they can reset your password !!
Hope this is helpful, if so would you please register that with Fixya
Cheers

I think you have be a BT customer to get a BT email (@bt.com. @bt.co.uk
see https://uk.answers.yahoo.com/question/index;_ylt=A9mSs2LGwJJUOQUAvY5LBQx.;_ylu=X3oDMTE0bzYzNmF0BHNlYwNzcgRwb3MDOARjb2xvA2lyMgR2dGlkA1ZJUFVLMTdfMQ--?qid=20080923095717AADSN23
(could be outdated)

This from the bt website :

Log in to BT Yahoo Mail

Use BT Yahoo Mail? You'll be moving to the new BT Mail later this year.
If you receive a message asking you to change your password, it's important you do so.
changing their mail service, but I don't think this changes what I have said above.
18.December.2014
BT ar

Not sure what your problem is, Joan; I was able to log in fine... HOWEVER, on the front page they tell you that the way you log in has changed; try this link;
http://home.bt.com/news/btlife/the-way-you-log-in-to-bt-yahoo-mail-has-changed-11363829537307

This are the simple solution from your problem:

1. go to the website of yahoo, www.yahoo.com
2. From there look for the word mail click it.
3.Now you have seen the yahoo mail sign in page,then look for the word I can't access my account
and then click it.
4. Select i forgot my yahoo I.D. click next and fill up the requirement need for the next page,until you access your original account.
Hope this simple solution could help you to solve your problem. Mam/Sir don't forget me to rate me up, i really appreciate what grade you have given to me.

In case your bt yahoo account is tide up to their corporate e-mail good chance that they might hold it. Your best option is to export all the mails that you need to keep and your address book.

Open a g-mail if you don't have one, they have a good size for FREE.

Once you sign up, forward all the mails and all your contacts to that new e-mail account.

Make sure you read their TOS (Terms of Service) to make sure that they can't hold anything against you.

Hope this helps,

J-inno