B.01
Malware and spam are caught before they reach your mail server and your mailboxes.
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.
01
Your Benefits
B.02
Your mail server is no longer directly reachable from the internet. Only the filter talks to it, which reduces the attack surface.
B.03
You need no additional server and do not maintain filter rules or signatures yourself. The operator takes care of that.
B.04
The switch-over happens via your domain's MX record, usually without changes to mailboxes or clients.
02
Service scope
L.01
Set-up of the filter for your mail domains and change of the MX records in the Netsource DNS Service
L.02
Checking of incoming emails for viruses, spam and phishing before delivery to your mail server
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Forwarding of checked emails to your mail server, which then only accepts mail from the filter (only the proxy may deliver)
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Thresholds and exceptions (sender whitelists) agreed with you
L.05
Delivery monitored as part of the maintenance contract
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Requirements and exclusions
→ Prerequisites
- Your own mail server (e.g. Exchange or Postfix on premises) with a fixed delivery address
- Your mail domain is managed by Netsource (NDS-DOM-DE), or we are given access to its DNS for the MX change.
- A firewall rule allowing the filter to deliver to your server
✗ Not included
- Mailboxes in Email Hosting (NDS-WP-MAILCOW) and Microsoft 365 (NDS-M365-BP) already include filtering. MailProxy is intended for self-operated mail servers.
- The filter only checks incoming email. Outgoing email, encryption and signing are covered by the Secure Mail Service (NDS-SEC-MAIL).
- It does not replace antivirus protection on workstations (NDS-SEC-AV), as the filter cannot see attachments that arrive by other routes.
- If your mail server fails, the filter does not hold mail indefinitely. BackupMX (NDS-SEC-BACKUPMX) covers that case.
- If you need your own rules, self-service quarantine and full logs, the Managed Mail Gateway (NDS-SEC-PMG) gives you a dedicated instance.
04
Related Services
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.
NDS-SEC-PMG
Managed Mail Gateway (Proxmox PMG)
Your own mail gateway in front of your mail server. We run a Proxmox Mail Gateway instance in the Netsource private cloud that serves your organisation alone. It filters spam and viruses, your staff manage their own quarantine, and the rules follow your specifications.
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-DOM-DE
Domain registration Germany
We register, manage and transfer domains under more than 1,000 extensions. In the Netsource DNS Service at dns.netsource.de you can also manage your domains yourself, around the clock. We have looked after more than 1,100 customer domains for years.
Does this fit your business?
In 30 minutes we work out whether this service suits you. Free and without obligation.