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Your business email has no ties to US cloud providers and is run in line with the GDPR
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.
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Your Benefits
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Your own IP addresses keep deliverability high, as you share no address pool with spammers
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Works with all the usual clients, from Outlook and Apple Mail to smartphones (ActiveSync)
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Grows from a single mailbox to several domains without a change of platform
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Service scope
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Dedicated virtual machine running Mailcow (in Docker containers)
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100 GB NVMe Ceph storage as standard, expandable to 500 GB
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2 vCPU and 6 GB RAM as standard, more if needed
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Your own IP addresses for outgoing mail, which improve your sender reputation
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IMAP, SMTP, ActiveSync (35 devices included) and webmail (SOGo)
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We set up DKIM, ARC and SPF/DMARC for each domain
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Built-in spam filtering (Rspamd) and virus protection (ClamAV)
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TLS encryption for data at rest and in transit
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Unlimited domains and aliases as standard
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CalDAV / CardDAV to keep calendars and contacts in sync
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Daily backup to PBS, with restores of individual mailboxes
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We monitor the mail queue and delivery rates via Wazuh
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Requirements and exclusions
→ Prerequisites
- Your own domain, with DNS hosted at Netsource or an approved third-party provider
- A DNS provider that supports SPF, DKIM and DMARC
- A maintenance contract, if you need a guaranteed response time
✗ Not included
- Microsoft 365 mail (Exchange Online) is licensed separately via NDS-M365-BP / NDS-M365-E3
- Moving from on-premises Exchange or M365 to Mailcow is handled as a project (NDS-PRJ-MIG)
- Audit-proof email archiving is covered by NDS-SEC-MAILARCH (Mailpiler), not by the Mailcow mailbox
- Please do not send newsletters or mass mailings via this service. We recommend a separate tool for that
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Related Services
NDS-SEC-MAILARCH
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.
NDS-WP-NEXTCLOUD
Nextcloud Managed
A sovereign alternative to OneDrive and SharePoint. Your Nextcloud runs in Berlin with Talk and Office built in, and Netsource looks after all of it.
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-SEC-MAILPROXY
MailProxy
A virus and spam filter in front of your own mail server. Incoming emails are checked in Germany before they reach your system. It is intended for businesses that run their own mail server and do not want to expose it to the internet unfiltered.
NDS-SEC-BACKUPMX
BackupMX
If your mail server goes down, a second mail server accepts your emails and holds them. Once your system is reachable again, it delivers them. Senders receive no error message and no email is lost.
Does this fit your business?
In 30 minutes we work out whether this service suits you. Free and without obligation.