---
title: "Create Inbox Rendering Test"
slug: "create-inbox-rendering-test"
updated: 2025-07-21T08:41:50Z
published: 2025-07-21T08:41:50Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Inbox Rendering Test

## Goal​

To check an email message before sendout for rendering across all clients and devices and to optimize deliverability.

Inbox rendering includes:

- A rendering preview at various clients and devices.
- A check to ensure that your message passes common spam checks.
- Important sender identity checks (DMARC, DKIM, SPF).
- Tests for subject line length, a valid list-unsubscribe header, and functioning links.

## Procedure​

> [!WARNING]
> Inbox Rendering cannot be started directly in the CMS area. To create a message check for a message you created in the CMS, start the sendout process. Then open a preview window. There you can start a message check.

1. During preparation or sendout, click **Preview**.
2. In the **Group**drop-down list, select the group you want to use for the message check.

This group should match the one intended for the actual sendout. The group settings influence the check results, including:
  - Subject line prefix or message header.
  - Group and member attributes.
  - List unsubscribe header.
  - We also use the Group email address to check spam lists.
3. Click ​**Send Rendering Test**​.
  - This triggers the rendering check process.
  - Mapp Engage sends test emails to a set of common email clients.
  - The system also evaluates deliverability, spam filter behavior, sender identity, and related issues.

Deliverability is the ability of an email to reach a recipient’s inbox successfully. It is influenced by factors like sender reputation, authentication, and engagement.

## Related

- [View Inbox Rendering Results](/view-inbox-rendering-results.md)
- [Inbox Rendering](/inbox-rendering.md)