Make Your Email Archiving Audit-Proof!
Legally compliant email archiving made effortless: zero extra manual work and fully automated.


Legally compliant email archiving made effortless: zero extra manual work and fully automated.

Trust onOffice enterprise for audit-proof email archiving, providing real estate agents with peace of mind. Safeguard all your business-related emails, such as purchase price agreements, commissions, and discounts, in a legally compliant manner. Our partnership with Benno MailArchiv ensures automatic storage without placing any additional burden on you.
Easily meet legal requirements – rely on audit-proof email archiving with onOffice enterprise.
No need to print and file every single email. We offer the service of Benno MailArchiv – your emails are stored immediately and immutably.
Simplify email retention and adherence to GoBD: Enjoy automated and permanent storage of all emails and attachments, both incoming and outgoing, from your domain. This streamlined process operates in the background, ensuring full compliance with GoBD regulations.
Looking for a specific email? Simply enter a keyword in the search bar to see a list of all relevant results. This works for all file formats!
We prioritize data security, ensuring your peace of mind. Take control of your mail archive’s protection by utilizing a personal password and limiting access solely to authorized individuals, such as your accounting staff.

Email archiving solutions are everywhere, but as a real estate professional, compliance and auditability are non-negotiable. Real estate brokerages are legally required to store business-critical emails and documents in compliance with regulatory standards (specifically GoBD in DACH markets), ensuring tamper-proof and legally sound retention. This applies to property brochures, contracts, and all client or applicant correspondence.
Audit-proof email archiving builds trust, ensures legal compliance, and increases operational efficiency—laying the foundation for secure, digital real estate transactions.
Setting up your email archiving is intuitive and takes just a few steps. Audit-proof email archiving is included in onOffice enterprise all-in or available as an add-on module for pro.
Your domain must be hosted by onOffice to allow integration with our partner, Benno MailArchiv. Archiving is enabled per mailbox on your domain.
In onOffice enterprise, navigate to Extras >> Settings >> Users and grant the relevant user the “Access external email archive” permission.
Access archived emails at any time via Quick Search. Under the Email tab, you will find the “Access Email Archive” option within Detailed Search and Detailed Filter.
Search by keywords within the Benno MailArchiv interface to retrieve specific emails instantly. You can also save custom search queries for quick access.
Discover how effortless legally compliant email archiving can be with onOffice enterprise. Try all features for 7 days—completely free with no obligations.


In addition to core day-to-day features, m² Immobilien relies on audit-proof email archiving. Having our mailboxes and domains hosted directly with onOffice streamlines many of our workflows. Furthermore, onOffice ensures we remain fully compliant and up to date with evolving legal requirements.
— Hans Buchs, Managing Director, m² Immobilien GmbH
Frequently asked questions about audit-proof email archiving
Email archiving is conducted exclusively through encrypted channels with our partner Benno MailArchiv. Data is stored on two different servers for maximum security. All emails from your domain, including attachments, are archived permanently and in compliance with GoBD standards. This process is automatic and runs in the background, so your workflow is not interrupted. The seamless archiving ensures all transactions are documented, which is crucial in legal disputes. Data security is assured, with password-protected access that can be granted only to selected personnel.
Yes, archived emails cannot be altered. The “Principles for the proper management and storage of books, records, and documents in electronic form and for data access” (GoBD) mandate that business-relevant processes must be retained for six years and accounting records for ten years. This requires audit-proof data storage: documents must be stored unalterably and securely.
Audit-proof email archiving is available only for email servers hosted by onOffice GmbH.
Stay fully protected, not just with email archiving. We offer even more solutions for your agency:
The foundation for your communication: Track all email correspondence automatically inside your brokerage activity log.
Access ready-to-use contract templates to ensure you always have the right legal documents on hand for every transaction.
Use our pre-built GDPR package inside the Process Manager to establish standardized data privacy workflows.
Audit-proof email archiving is available in the following versions:
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