---
title: Set up a Journey with PostGrid custom activity | PostGrid
description: How to create a Salesforce Marketing Cloud Journey using a Data Extension entry source and the PostGrid Custom Activity.
---

To create a new journey in the marketing cloud, first, you have to navigate to **Journey Builder**.

![Salesforce Marketing Cloud platform navigation with Journey Builder highlighted](/_astro/01-image.AUXwDAUk_1Hm6eA.webp)

Click on **Create New Journey**

![Salesforce Marketing Cloud Journey Builder list with the Create New Journey button](/_astro/02-image.B71yIQJI_Z2v266E.webp)

Select **Multistep Journey** and click on **create**

![Salesforce Marketing Cloud journey type selection with Multistep Journey option and Create button](/_astro/03-image.PKXdI8wn_Z1RO0hO.webp)

Select **Data extension** as an Entry source and **PostGrid** as activity from messages list and add it to the journey by by drag and drop

![Salesforce Marketing Cloud journey canvas with Data Extension entry source and PostGrid activity added](/_astro/04-image.DEy9h0Aa_1sNS3F.webp)

Click on Data Extension and choose `PostGrid_Contact_Data` as entry source.

![Salesforce Marketing Cloud Data Extension picker with PostGrid\_Contact\_Data selected as the entry source](/_astro/05-image.BdfUIjtT_ZlRu2u.webp)

Click on **Summary** and then **Done**.

![Salesforce Marketing Cloud Data Extension summary screen before confirming the entry source selection](/_astro/06-image.Dj_O4Iz7_ZlI0IU.webp) ![Salesforce Marketing Cloud Data Extension entry source configuration with Done button](/_astro/07-image.CmXPr_l8_kr8KW.webp)

After completing all the steps for data extension, proceed by clicking on the PostGrid Custom Activity within your Journey to begin setup

![Salesforce Marketing Cloud journey canvas with the PostGrid Custom Activity step ready to configure](/_astro/08-image.Bj_wP-QT_ZPiX3i.webp)

In Step 1, you can see the Test API key and Live API key you set up in the `PostGrid_Credentials_Data`data extention. If you wish to proceed with the current setup click on Next.

You are able to change the API key here for the current journey only here.

![](/_astro/09-image.Cz4wFP_M_1b9Trn.webp)

In Step 2, select a **Message Format** from **Letter**, **Postcard**, or **Self-Mailer**. Then choose a **Message Design Format** of **HTML** if you want to enter custom HTML, **PDF** if you want to provide a PDF URL, or **Existing Template** if you want to use an existing template from your PostGrid account.

You can also toggle between Test Mode and Live Mode in PostGrid. Live Mode Toggle button will only be enabled when the valid Live API Key is entered in Connect Account screen. Orders placed in Test Mode are for testing purposes only and will not be processed or sent.

![](/_astro/10-image.CizjpG3s_ZalX4X.webp)

The next screens will vary depending on your selected Message Type, **Letter**, **Postcard**, or **Self-Mailer**, and are described in separate sections accordingly.