Step Wise Manual Sina mail settings for thunderbird
If you don't have a Sina mail address. you can create an email id from here then you can Sina 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, Sina Email address and Password then press Continue.
Click on the Manual config menu at bottom.
Enter Below Sina incoming server settings.
In incoming click on the dropdown menu and select POP.
Add server host :pop.sina.com
Port: 110
select SSL/TLS
Enter Below Sina outgoing server settings.
In outgoing select SMTP.
Add server host :smtp.sina.com
Port: 25
select SSL/TLS
Tap on Done. Now you are ready to use your Sina email account on your Thunderbird.