Visit https://email.bt.com/ and login to your BT email account.

After login click on the down chevron in the top right corner next to your email address.

Then click Settings

In the sidebar on the left hand side. Click on mail

Then click on Accounts

Click on Add button

On the add account screen fill out the following info:
How your emails will appear
| Discription | Email Address |
| Your Name | Your Name |
Account Access
| Email Address | Email Address |
| Password | Password |
| Email Protocol | IMAP |
Then click Adanced settings

Add the following info
Receiving emails
| Incoming server address | mail.livemail.co.uk |
| Port | 993 |
| SSL | Ticked |
Sending emails
| Outgoing server address | smtp.livemail.co.uk |
| Port | 465 |
| SSL | Ticked |
Then Click Save

To go back to webmail. Click on Mail in the bar at the top.

Your mailbox should show up in the bottom left corner. Click it in order to view it.