G DATA Mail Protection

Latest Information

January 9, 2026

All G DATA Mail Protection communications now use port 443/TCP exclusively. Opening port 2675 in your firewall is no longer necessary.

September 11, 2025

This update includes several adjustments and improvements.

Fixed an issue that removed configuration values under certain circumstances.

Fixed an issue that prevented settings from being saved when only the file filter was enabled.

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

The sender is now recorded as the reason for quarantine in the quarantine side pane if the sender is on the blacklist.

The MIME type is now recorded as the reason for quarantine under "File Detection" if the MIME type is on the blacklist.

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

The Dashboard now displays the number of protected users and the total number of users.

Whitelists take precedence over blacklists.

For example, this allows blocking all MIME types "application/*" with an Exclusion for "application/pdf".
For example, this allows blocking all URLs "*@example.de" with an Exclusion for "important@example.de".
Sender whitelists and blacklists override all other Detections.

August 22, 2025

Software update with the following changes:

Improved Sender Whitelist

Previously, senders could only be exempted from spam Detection. Emails from approved senders are now always delivered.

Emails from whitelisted senders are also no longer scanned for malware.

Change to Spam Filter Controls

The spam filter can now only be enabled if the URL filter is enabled, because checking URLs is an important factor in spam Detection.

New MIME Type Filter

MIME type filter option for the file filter:
- Easily specify allowed and blocked file types.
- Maximum file size – specify the file size above which files are automatically moved to quarantine.
- Helpful examples are displayed when no filter is defined.
Improved quarantine view:
- The MIME type and file size are displayed directly in the quarantine entry’s side pane.
- One-click whitelist feature for MIME types.

For detailed information about the new filters, see this article.

February 18, 2025

Software update with the following changes:

Settings backups can now optionally include users, which can be backed up and restored later (export and import).

If you have multiple licenses, you can now select by company name in the selection field used to switch licenses.

The previous search feature has been replaced with column-based search (filters). You can now search across multiple columns.

The quarantine action column now includes the following features:

Download Email
Release Email
Delete Email

November 7, 2024

Software update with the following changes:

Improved Clarity in Quarantine:

The MailID column has been moved closer to the beginning.
A new Status column shows
- whether an email has newly arrived in quarantine.
- whether it has already been released.

Changed Email Release Behavior:

Previously, emails were deleted from quarantine after being released. Emails now 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 have been made to managing emails in Microsoft Defender quarantine when it is managed together with our quarantine.

October 1, 2024

Software update with the following changes:

Portal Configuration and Navigation:

On the Verify page of the mail server configuration (see step 9), you can now select an email address for sending a test email from a drop-down list of imported users.
The option to enable/disable domains has been removed.
Every verified domain of a mail server is now considered enabled.

External incoming emails to users whose domains were previously disabled are scanned. Scanning of internal emails is disabled by default for these users. This prevents scans from starting in mailboxes that were not intended to be scanned before this change.
Scanning behavior for incoming emails (external emails), rescanning (internal emails), and globally enabled status Alerts can now be configured per user.
The Dashboard tiles Emails in Quarantine, Protected Mail Servers, Protected Domains, and Protected Users now take you directly to the relevant details area.
A permissions check for G DATA Mail Protection has been added to the server settings.
If G DATA Mail Protection has not been granted all necessary permissions in Exchange Online, this check shows which permissions still need to be configured in Exchange Online.

Changes to G DATA Mail Protection Quarantine

Changed handling of infected emails:
Previously, infected emails that had already been delivered were moved to a hidden folder in the user’s mailbox. This primarily applied to internal emails between employees. The disadvantage of this approach was that infected emails could be found through Outlook search.
Infected emails are therefore now deleted from the user’s mailbox and moved to G DATA 365 quarantine. If an administrator releases such an email, the user receives a newly created email with the original email attached.
A button has been added to the quarantine details page for adding blocked URLs to the whitelist.
A new Users column has been added to the overview on the quarantine details page. This makes the original recipient of the quarantined email immediately identifiable.

Other Changes

The sender email address used by G DATA Mail Protection is changing:

Status Alerts are sent from quarantine@mailprotection.gdata.de.
Test emails are sent from testmail@mailprotection.gdata.de.
Issues with sorting quarantined emails by arrival time have been Resolved.
Issues with downloading the log archive have been Resolved.

March 1, 2024

Initial release of G DATA Mail Protection.