coreILLA - Workflow Builder: How-to attach Custom Values (MMS) to SMS messages in workflows

Custom values are exceptionally powerful and versatile. In this guide, we will cover how you can use custom values to send MMS messages within workflows. 

Custom values are great for leveraging snapshots and your favorite workflow(s). Its a quick and simple setup making your automation more scalable and exciting

Setup your custom value URL

1. Click on Settings

2. Click on Custom Values

3. Click on Add New Custom Value

4. Type "Appointment Confirmed Image"

5. Paste selected text into input

6. Click on Create

7. Head into your workflow where you would like to send the MMS

8. Click on Automation

9. Click on Add Action

10. Click on Send SMS

11. Click on the box to type your message and add the image here.

12. Click on the highlighted button.

13. Click on Custom Values

14. Click on Appointment Confirmed Image or any other custom value which you created.

15. Click on Save Action

16. Troubleshooting

What is the maximum MMS size when sending SMS?

17. Click on jpeg…

18. My custom value does not work when the message is sent?

Please double-check to make sure:

1. There are no spaces in your custom value URL, you can test this by adding it to a dummy funnel and previewing the page. If the MMS appears the custom value works, please proceed to the next step below
   
2. The MMS URL meets the size requirement for the provided carrier (see question above)

Updated on: 06/18/2025