G DATA 365 | Mail Protection

Current information

09.01.2026

All communication channels for G DATA 365 | Mail Protection now occur exclusively via port 443/TCP. Opening port 2675 in your firewall is no longer necessary.

11.09.2025

This update includes several adjustments and improvements.

Bug fix for an issue in which configuration values were removed under certain circumstances.

Bug fix for an issue in which settings could not be saved when only the file filter was enabled.

New reverse DNS entry mailprotection-outgoing.gdata.de for the IP range 194.156.84.32/28.

The sender is now entered as the reason for quarantine in the quarantine side panel if the sender is on the blocklist.

The MIME type is now entered as the reason for quarantine under "File detection" if the MIME type is on the blocklist.

The file size is now entered as the reason for quarantine under "File detection" if the email contains a file that is larger than the permitted file size.

Display of the number of protected users and total users on the Dashboard.

Prioritization of allowlists over blocklists.

This enables, for example, blocking all MIME types "application/*" except "application/pdf".
This enables, for example, blocking all URLs "*@example.de" except "important@example.de".
Sender allowlists and blocklists override all other detections.

22.08.2025

Program update with the following changes:

Optimized sender allowlist

Previously, senders could only be allowlisted for spam detection. Now, emails from allowlisted senders are always delivered.

Emails from senders on the allowlist are now also no longer checked for malware.

Change to spam filter control

The spam filter can now be enabled only when the URL filter is enabled, because an important factor for the detection of spam is checking the URLs.

New MIME type filter

MIME type filter option for the file filter:
- Easy definition of allowed/blocked file types
- Maximum file size – specify from which file size files should be moved to quarantine automatically.
- Helpful examples are displayed if no filter is defined.
Improved quarantine view:
- Display of MIME type and file size directly in the entry’s side panel in quarantine.
- One-click allowlist function for MIME types.

Detailed information about the new filters is available in this article.

18.02.2025

Program update with the following changes:

With the settings backup, you can now optionally also back up and later restore the users to back up and later restore (Export and Import).

If you have multiple licenses, you can now select the company name in the selection field for switching to another license.

The previous search function was replaced by a column search (filter). It is now possible to search across multiple columns.

The quarantine action column was expanded with the following functions:

Download email
Release email
Delete email

07.11.2024

Program update with the following changes:

Improvements to clarity within quarantine:

The MailID column was moved further to the front.
A new Status column was introduced. There you can see
- whether an email was newly moved to quarantine.
- whether it has already been released once.

Behavior when releasing emails changed:

Previously, emails were deleted from quarantine after being released. Now, emails remain in quarantine and can be released multiple times. This reduces the risk of losing an email if problems occur during release.

Microsoft Defender quarantine:

Improvements were made to the management of emails in Microsoft Defender quarantine when they are to be managed together with our quarantine.

01.10.2024

Program update with the following changes:

Configuration and navigation in the portal:

On the Review page of mail server configuration (see item 9), you can now select an email address for the test email from a drop-down list of imported users.
The option to enable/disable domains was removed.
Each verified domain of a mail server now counts as enabled.

Incoming external emails to users whose domain was not previously enabled are scanned. Scans of internal emails are disabled by default for these users. This prevents scans from starting in mailboxes that should not be scanned even before this change.
The check behavior for incoming emails (external emails), the rescan (internal emails), and the globally enabled status messages can now be configured on a per-user basis.
You can now use the Dashboard tiles Emails in quarantine, protected mail servers, protected domains Domains, and protected users to navigate directly to the relevant detail area.
A permissions check for G DATA 365 | Mail Protection was added in the server settings.
If not all required permissions for G DATA 365 | Mail Protection are present in Exchange Online, you will see which permissions still need to be set in Exchange Online.

Changes to G DATA 365 | Mail Protection quarantine

Change in how infected emails are handled:
Previously, infected emails that had already been delivered were moved to a hidden folder in the user’s mailbox. This mainly applied to internal emails between employees. A disadvantage of this procedure was that infected emails could be found via Outlook search.
Therefore, infected emails are now deleted from the user’s mailbox and moved to G DATA 365 quarantine. If such an email is released again by an administrator, the user receives a newly created email with the original email as an attachment.
A button was added on the quarantine details page that allows blocked URLs to be conveniently added to the allowlist.
A new User column was added to the overview on the quarantine details page. This makes the original recipient of the email moved to quarantine immediately recognizable.

Other

The sender email address for G DATA 365 | Mail Protection is changing:

Status messages are sent from quarantine@mailprotection.gdata.de.
Test emails are sent from testmail@mailprotection.gdata.de.
Issues with sorting quarantine emails by receipt time were Resolved.
Issues when downloading the log archive were Resolved.

01.03.2024

Release of the first version of G DATA 365 | Mail Protection.