DPG Service release 7.1.1483.3 (patch)

Release date: December 1, 2025

In the following, we describe the changes that have been made to all versions of DPG Service that are still supported. Release notes are displayed with a version number, date of release, a brief heading, as well as a more detailed description of the new or altered functionality.

NDR message for unknown tunnel mail

If a tunnel mail is received for an email address that does not exist, an improved NDR message is now sent back to the sender.

The original sender is informed about the subject, sender, time, and MessageId: