Add your hosting mailbox to Mozilla Thunderbird as follows.
- Go to Account Settings > Account Actions > Add Mail Account.
- Enter your name, full email address, and password, then click Configure manually.
- Incoming: IMAP, server
mail.yourdomain.com, port993, SSL/TLS, normal password. - Outgoing: SMTP, server
mail.yourdomain.com, port465SSL/TLS (or587STARTTLS), normal password. - Username for both: your full email address.
- Click Re-test, then Done.
If Thunderbird warns about the certificate, switch the server name to the secure hostname listed in cPanel under Connect Devices. Prefer POP3? Use port 995 with SSL/TLS instead. Still stuck? Open a ticket.