Introduction

This manual will describe the general information for setting up a mailflow rule for Secure Direct Replies in any mailserver. Please use the pages below for the specifc instructions on:

1. Exchange Online
2. Exchange on premise
3. Google Workspace

If your organization is using another mailserver, please setup the routing like described below.

Mail Routing Logic

The logic (mail-server agnostic) should effectively look as follows:

• If: the References header of an email contains zivver-sdr-<your-Zivver-UUID>
  • There is no need to add the angle brackets (< >) that wrap the value in practice.
• Then
  • Add the zivver-relay header with the value:
    • sdr → when using the Zivver Encryption Gateway.
    • smart-sdr → when using the Zivver DLP Gateway.
  • Route the message to smtp.zivver.com.
• Except if: the message headers contain the X-Zivver-Transport header
  • This ensures that the IDD message itself - which also contains the SDR value in the References header - is not looped back to Zivver.