Only about 10 days after the blog post[1] about their funding goal #K9Mail seems to already be more than halfway to the goal of reaching the 1000€/week required for sustainable future development of the project: https://liberapay.com/k9mail
[1] K-9 Mail is looking for funding:
https://k9mail.app/2021/02/14/K-9-Mail-is-looking-for-funding
@Bubu have you thought about doing something similar to fund #OpenPush ?