Step Wise Manual Opera-mail mail settings for thunderbird
If you don't have a Opera-mail mail address. you can create an email id from here then you can Opera-mail 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, Opera-mail Email address and Password then press Continue.
Click on the Manual config menu at bottom.
Enter Below Opera-mail incoming server settings.
In incoming click on the dropdown menu and select IMAP.
Add server host :imap.myopera.com
Port: 993
select SSL/TLS
Enter Below Opera-mail outgoing server settings.
In outgoing select SMTP.
Add server host :smtp.myopera.com
Port: 587
select SSL/TLS
Tap on Done. Now you are ready to use your Opera-mail email account on your Thunderbird.