Thunderbird Mail Setting
1- Download Thunderbird >> Open Thunderbird >> Click on “Email”
2- Click on “Skip this and use my existing email”.
3- Enter your name, email and password >> Click on “Continue” (your mail should be mail.your-domain.com)
4- Check all options as below in figure e.g Name , Email, Password, IMAP Checked.
5- That’s all Things , Done !