Please follow the detailed instructions with screenshots below for setting Mozilla Thunderbird 3.0 up to work with turboSMTP server.
(Remember anyhow that Thunderbird is not the best tool for email marketing, having been created primarily for one-to-one messages and not for mass email sending. That's why we recommend that you rely on a dedicated sending software like SendBlaster: it's the best way to manage your email campaigns & lists!)
Please note that Thunderbird will ask you for your turboSMTP password (the one you provided when you registered) the first time you try to send mails with turboSMTP.
Many ISPs are now blocking traffic on default SMTP port 25. To avoid this restriction you can:
Be sure that your firewall is not blocking these ports.