You can sign out of your Flockmail mailbox by simply following the below-mentioned steps:
1) Click on the Settings icon at the top-right corner
2) Navigate to the option of Logout at the bottom
3) Confirm your choice by clicking on the button Logout
4) Once confirmed, you'll be taken to the Login page of Flockmail!
Feel free to reach out to us at firstname.lastname@example.org for any queries regarding this, we'll be happy to help you!