Step Wise Manual Telefonica mail settings for thunderbird
If you don't have a Telefonica mail address. you can create an email id from here then you can Telefonica email login.
Open Thunderbird Software App. Click on Email
When you click on the email, pop-up Set UP an Existing Account Screen.
Enter Your name, Telefonica Email address and Password then press Continue.
Click on the Manual config menu at bottom.
Enter Below Telefonica incoming server settings.
In incoming click on the dropdown menu and select IMAP.
Add server host :imap.telefonica.net
Port: 143
select SSL/TLS
Enter Below Telefonica outgoing server settings.
In outgoing select SMTP.
Add server host :smtp.telefonica.net
Port: 25
select SSL/TLS
Tap on Done. Now you are ready to use your Telefonica email account on your Thunderbird.