What is Email UID? #

Every email sent by DMSI DDLS is assigned a unique identifier — the Email UID. This UID is:

• Injected as an X-DMSI-UID header in the outgoing email
• Stored in the Email Logs table
• Searchable in the Email Logs admin screen
• Viewable in the per-email detail panel

Email UIDs make it possible to trace a specific email delivery end-to-end — from the DDLS send queue through to your mail provider’s logs.

Finding an Email UID #

In DDLS → Email Logs, each row in the log table includes an Email ID column. Click any row to open the detail view, which shows the full UID, recipient, subject, template used, send timestamp, and delivery status.

Searching by UID #

Use the search field in Email Logs and enter the UID to locate a specific email record. This is useful when a customer reports not receiving an email and you need to confirm it was sent.

X-DMSI-UID Header #

The UID is also present in the raw email as a custom header:

X-DMSI-UID: <uid-value>

If your mail provider supports header-based log search (e.g. SendGrid, Mailgun), you can use this header to correlate DDLS records with provider delivery events.