[oh8eleven]

Are you saying that you can create a portable Thunderbird address now?
I do not believe TB provides (or ever did provide)any email service like Yahoo, Gmail, etc. That is, no such thing as "my_email_name@thunderbird.com".
But even if they did, you would still access it from anywhere in the world just like you would for Gmail, Yahoo, etc.
Thunderbird is an email program just like Eudora or Pegasus. You tell it where your email provider is located (eg, https://login.yahoo.com/), the account info & password, and then TB will retrieve your mail.

[Windflier]

Thunderbird is an email program just like Eudora or Pegasus. You tell it where your email provider is located (eg, https://login.yahoo.com/), the account info & password, and then TB will retrieve your mail.

Then nothing's changed in the basic way Thunderbird functions since I last used it.

If I have to create a Yahoo email account, just so I can point it to a different email program, I may as well just use Yahoo for email. I don't see the point in using Thunderbird under that circumstance.

I liked using the program when I didn't use Yahoo, et al for email. Then, I simply pointed Thunderbird to my ISP and created my own email address@myisp.com

Thanks.