> For the complete documentation index, see [llms.txt](https://docs.daylite.app/help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.daylite.app/help/center/daylite-mail-assistant/daylite-mail-assistant-could-not-look-up-the-related-message.md).

# Daylite Mail Assistant Could Not Look up the Related Message

When selecting an email within a conversation in Mail, the Daylite Mail Assistant shows a message that the Daylite Mail Assistant could not look up the related message.

![](https://d33v4339jhl8k0.cloudfront.net/docs/assets/66e2fe04616d4044914c66f1/images/671a52c5f539bb6e3c7c6c04/img-157662-1729778372-460988765.png)

This happens when you select a message within a conversation, which displays from various folders as a conversation. However, Mail doesn't give access to the email's **message-id**, which Mail Extensions need to access the email's contents.

To address this, you can add a custom message header with the **message-id**. Follow these steps to add it:

1. Open Mail and choose **Mail** > **Settings**
2. Click **Viewing**
3. Click the menu next to **Show message headers:** and select **Custom**
4. Add a custom header by clicking **+**
5. In the text field type `message-id`
6. Click **OK**

Once you've added you will see the message-id within the email header, allowing Daylite Mail Assistant to access the contents of related messages within a conversation.

![Screenshot\_2024-04-18\_at\_8\_36\_25 PM.png](https://d33v4339jhl8k0.cloudfront.net/docs/assets/66e2fe04616d4044914c66f1/images/671a52c5f539bb6e3c7c6c05/img-157662-1729778372-1579987073.png)


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