Zivver messages that you send with Zivver Plugin Assisted Mail Submission (PAMS) or Zivver OWA Assisted Mail Submission (OWA-AMS) enabled in the Zivver client carry the following artifacts:

• The custom mail header zivver-relay with the value zivver-message-info.
• A hidden metadata file.

Every outbound message with the zivver-relay mail header must be submitted to the Zivver SMTP Gateway.

Depending on your mail server or Secure Email Gateway (SEG), you may be able to filter on this mail header. After filtering, your mail server or SEG must submit these messages to the Zivver SMTP Gateway.