Operated by the Heinlein Group in Berlin, mailbox.org provides a full suite of communication and productivity tools (email, calendar, contacts, cloud storage, video conferencing) that are designed for data protection and compliance. The service is fully GDPR-compliant and hosts all data in German data centers to ensure user privacy and legal adherence. mailbox.org is targeted at businesses, authorities, schools, and individuals who need secure, ad-free email and office services. With around 30 years of experience in secure open-source technology (Heinlein Group’s expertise), mailbox.org offers features like multiple domains, antivirus/antispam filtering, and “Made in Germany” quality seals, reflecting its focus on digital sovereignty and robust security.