Step Wise Manual Mailhaven mail settings for thunderbird
If you don't have a Mailhaven mail address. you can create an email id from here then you can Mailhaven 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, Mailhaven Email address and Password then press Continue.
Click on the Manual config menu at bottom.
Enter Below Mailhaven 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 Mailhaven 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 Mailhaven email account on your Thunderbird.