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