Thundermail - Privacy-Focused Email from Thunderbird Introducing Thundermail. Ad free, privacy-first email from Thunderbird that puts you in control. You might know Thunderbird as the app you use to manage email. Now we’re building the email service behind it, too. Thundermail is an inbox with no ads and no data selling. (Sorry if this has been posted before, I can remove it if so but this was news to me)