B.01
You meet the legal obligation to keep business-relevant emails in line with GoBD.
Email archiving (GoBD)
We archive all business emails in an audit-proof way under the German GoBD rules. Emails are kept unaltered for 10 years, can be searched together with their attachments (including text recognition, OCR) and exported for auditors or the tax office. A pilot is already live at archive.netsource.de.
01
Your Benefits
B.02
Cryptographic checksums protect every email, so nothing can be deleted or altered afterwards.
B.03
Full-text search finds content in attachments too (Office documents, PDF, images via OCR) within seconds.
B.04
For audits and tax inspections you can produce emails without spending days searching PST files.
02
Service scope
L.01
Dedicated Mailpiler instance per customer in the Netsource private cloud
L.02
Connection to Mailcow via BCC forwarding in Postfix (always-BCC per domain)
L.03
Mailpiler accepts the mirrored emails via SMTP and indexes them automatically
L.04
10 years' retention as standard, longer retention available
L.05
100 GB storage as standard (about 300 GB of email thanks to compression), expandable to 200 GB
L.06
Full-text search across all email content and attachments including OCR (PDF, images, Office)
L.07
Web interface where authorised users can look up individual emails
L.08
Export for audit requests (EML, ZIP)
L.09
Access control via single sign-on (SSO) with Zitadel
L.10
Daily backup to PBS, restore test every six months
L.11
Monitoring of the archiving process via Wazuh
03
Requirements and exclusions
→ Prerequisites
- Email Hosting (NDS-WP-MAILCOW) or Microsoft 365 (NDS-M365-BP/E3) as the source mail server
- Connection to Zitadel, so that only authorised people can search
- Maintenance contract, if you need a guaranteed response time
✗ Not included
- Deleted mailboxes are restored through separate backup building blocks, NDS-SEC-BCK-ACR-M365 (M365) or NDS-PVE-PBS (Mailcow).
- Which classes of email you must archive is covered by our compliance consulting (NDS-PRJ-COMPL).
- Moving an existing archive from MailStore, Benno or other solutions is a project (NDS-PRJ-MIG).
- Court-proof e-discovery analyses with time-stamped evidence are a special service and not part of the standard package.
04
Related Services
NDS-WP-MAILCOW
Email Hosting
Email hosting with Mailcow in a German data centre, independent of Microsoft. You get a dedicated VM with your own IP addresses, IMAP, SMTP and ActiveSync, and built-in spam and virus filtering.
NDS-SEC-BCK-ACR-M365
Acronis Backup Microsoft 365
We back up your Microsoft 365 mailboxes, OneDrive, SharePoint and Teams with a second provider. The data is stored in Germany and stays available even if something goes wrong at Microsoft.
NDS-PRJ-COMPL
Compliance consulting
We advise you on GDPR, ISO 27001 and BSI IT-Grundschutz. The result is a list of measures, ordered by what matters most for your business.
Does this fit your business?
In 30 minutes we work out whether this service suits you. Free and without obligation.