Is an archive the same as a backup?

No. A backup restores systems after a failure and is continuously overwritten. An archive meets legal retention obligations: every email is stored immutably and stays intact even if deleted from the mailbox.

What does email archiving cost?

From 2.49 euro per mailbox per month - including storage and setup, with no minimum quantity. The exact price depends on mailbox count and contract term.

Where are the archived emails stored?

In German ISO 27001-certified data centers, AES-256 encrypted and in a dedicated archive instance per customer - GDPR-compliant.

Pricing

Archive your mailboxes in a legally compliant way - from the oneCorp Cloud

One price per mailbox per month - storage and setup included. The more mailboxes and the longer the term, the lower the price.

1-49 mailboxes

For small and medium teams

12-month term

3,49 €

/ P.O. box

24-month term

Better

3,29 €

/ P.O. box

Jetzt anfragen

50+ mailboxes

For larger organisations

12-month term

3,29 €

/ P.O. box

24-month term

Better

3,19 €

/ P.O. box

Bester Preis

Jetzt anfragen

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Storage included

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Setup & Import Included

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Exclusive Archive Instance

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No minimum purchase requirement

All prices are per mailbox per month, including storage. No minimum purchase required. All prices are subject to applicable sales tax.

What features does MailStore offer?

Thoughtfully designed features make professional email archiving efficient and effortless for your business. With MailStore, your email communication stays organized, secure, and compliant with legal requirements at all times.

Automatic Archiving

Emails from mailboxes and PST files are archived automatically.

Legally Compliant Retention

Meets statutory retention periods and protects against data loss.

Full-Text Search

Find any email fast, even in large archives.

Storage Optimization

De-duplication and compression reduce storage requirements.

Access Controls

Granular user and permission management for security and data protection.

Audit-Proof Storage

Tamper-proof, encrypted storage prevents subsequent changes and ensures audit-proof integrity.

Journaling

Complete capture of every inbound and outbound email — even messages deleted later remain fully archived.

Legal Hold

Extend retention on demand: protect relevant emails from deletion for litigation and legal cases.

Why Email Archiving Is Mandatory

Companies in Germany are legally required to retain business-relevant emails in full, unaltered, and for several years. Managed MailStore meets these requirements automatically.

GoBD compliant

The German GoBD principles require traceable, tamper-proof retention of tax-relevant emails. Managed MailStore archives without gaps and logs every access.

Meet Retention Periods

Depending on the document, retention periods of 6 to 10 years apply (German HGB & AO). Retention policies ensure nothing is deleted too early or forgotten.

Audit-Proof & GDPR Compliant

Encrypted, unalterable storage in German data centers - audit-proof and in line with the GDPR.

Common misconception

An archive is not a backup - and a backup does not replace an archive

Q: What is email archiving?

With email archiving, every incoming and outgoing email is stored automatically, completely and immutably in a central, secure location - separate from the mailbox. Emails stay findable and legally intact long term, even if they are deleted from the mailbox.

Both sound like "emails are safe", but they solve entirely different problems. Backups alone do not meet legal retention requirements.

Backup

Recovery

Purpose: restore systems after failure or attack

Snapshot - continuously overwritten

Deleted emails are gone once retention expires

Finding a single old email? Tedious to impossible

A Solution Without Compromise

A Full-Featured Archive for Every Client

Your data is never stored alongside other companies' data in a shared archive. Instead, every client gets a dedicated archive instance that runs entirely separately.

Person using a laptop with email icons floating around, representing secure email archiving and management.

Long-Term Independence

Managed MailStore is not a one-way street. All emails can be restored from the archive at any time and in standard formats. This guarantees long-term independence - even from Managed MailStore itself.

Absolute Confidentiality of Your Data

While we manage your archive, we have no direct access to the data it contains. Your data is stored encrypted, and every access is logged.

Convenient, Fast Access

Your team can access archived emails through seamless Microsoft Outlook integration, via Web Access, or on mobile - and retrieve them in seconds

Illustration of a person using a laptop while several email icons float around them, reaching out to click one of the messages.

Up and Running in 3 Steps

From the first consultation to a fully running archive, we handle the entire setup for you - including migrating your existing emails.

Consultation & Analysis

Together, we assess your required number of mailboxes and email system while taking all legal requirements into account.

Setup & Migration

We set up your dedicated archive instance and import existing emails - including PST files and legacy mailboxes.

Automatic Operation

Going onward, all emails are automatically archived, audit-proof, and accessible via Outlook, web, or mobile.

FAQ

Häufig gestellte Fragen

What is email archiving?

With email archiving, all incoming and outgoing emails are automatically stored in full and in an unalterable form in a central, secure location, separate from the mailbox. This ensures long-term access and legally compliant retention, even if emails are deleted from the mailbox.

How does email archiving work with Managed MailStore?

Managed MailStore is connected to your email system (e.g. Microsoft 365 or Exchange) and automatically archives incoming and outgoing emails in an exclusive instance for you in German data centers. Your employees can continue to access all emails via Outlook, a web browser, or mobile devices.

Is email archiving mandatory for my company?

Yes. Business and tax-relevant emails must be stored in an audit-proof manner for 6 to 10 years, depending on the type of document, in accordance with GoBD, HGB, and AO. This also applies to small businesses and sole proprietors.

What is the difference between archiving and a backup?

A backup is used for short-term recovery in case of emergencies. An archive preserves emails in an unalterable, complete, and legally compliant way over many years. Both complement each other - a backup does not replace compliant email archiving.

Which email systems are supported?

Supported systems include Microsoft 365, Microsoft Exchange, Google Workspace, IMAP and POP3 mailboxes, as well as PST files. We handle the complete setup and integration for you.

Where is my data stored?

Exclusively in German data centers - encrypted and stored in a dedicated archive instance operated separately from other customers.

Does oneCorp have access to my emails?

No. We administer your archive, but we do not have access to its contents. Your data is stored in encrypted form, and every access is logged.

How much storage is included?

Each mailbox includes 15 GB of archive storage. Since MailStore de-duplicates and compresses emails, this typically covers a multiple of the original mailbox volume. If needed, we can expand the archive at any time in 15 GB increments without interrupting normal operation.

Can I export my data later?

Yes, at any time. All emails can be exported from the archive in standard formats, ensuring your long-term independence.

How much does Managed MailStore cost?

Managed MailStore starts at €3.49 per mailbox per month, including 15 GB of storage and setup, with no minimum number of mailboxes. The exact price depends on the number of mailboxes and the contract term.

Can I create an audit user?

Yes, audit users can be created for audit and monitoring purposes. Each audit user requires its own license and is billed like a regular mailbox for the period during which it exists in the system.