Please expand on this. Are you asking here how much Mailfence donates to Thunderbird? If so, I doubt that this would be the place to review financial issues between Mozilla and other organizations.

Providing a general load of info just in case any one reads this. Mailfence is a server. You can create an account and set up email address directly via mailfence website OR you can do it via Thunderbird using 'File > New > Get a new mail account' because a partnership has been created to provide this facility. You can get mailfence for free but it will have a more limited server quota space OR pay extra to get more space. That has nothing to do with Thunderbird. It is solely an agreement between you and mailfence. Mailfence has nothing to do with Thunderbird other than a partnership. Thunderbird facilitates a direct means of you using mailfence to create a new mailfence account and email address. * https://blog.mailfence.com/thunderbird-partnership/ Regardless of how you create the mailfence account, you can use Thunderbird to access your mailfence account via imap or pop. Thunderbird is an email client program you download and run on your computer. It is not a server. It is also free, but it encourages people to donate to provide funds for maintenance. Setting up Thunderbird to access a created mailfence account: * https://kb.mailfence.com/kb/how-can-use-mailfence-messages-with-thunderbird-using-smtp-and-imap-pop/ Additional info links: https://blog.thunderbird.net/2021/03/mailfence-encrypted-email-suite-in-thunderbird/ RE: '''non-donation revenue''' * https://blog.thunderbird.net/2022/05/thunderbird-2021-financial-report/ quote: ''Do we have other sources of income? Yes, but that non-donation income is negligible, and represents less than a fraction of a fraction of one percent. It comes from our partnerships with Gandi and Mailfence for users to get new email addresses.'' Thunderbird receives payments when users sign up for the email providers Gandi and Mailfence via Thunderbird. So if you already have a mailfence account and it's not been created via Thunderbird, then no non-donation revenue has occured. So basically Thunderbird still relies on donations from users because after helping to provide an email address, the ongoing support, maintenance and anything else Thunderbird the product offers has nothing to do with partners. Hope you find this info useful.