Skip to main content
Best answer

How to add a contact to Mailchimp only if the email field in Trello is not empty

  • August 7, 2025
  • 4 replies
  • 20 views

Forum|alt.badge.img+1

I want to run a Zap from Trello to Mailchimp, to only add the contact to Mailchimp if the field Email on the Trello card is not empty.

I’ve tried filters, but I cannot find an option in there to select ‘is not blank’ and the same for Paths. I tried to run it based on Email field exists, but the field will always exist on the card, whether it’s empty or not so that didn’t work.

How would I be able to do this?

Best answer by KimV84

Hi, I tried to use 'email field does not exist' and tested with a record where the email field on the trello card was blank.

However the filter ran and still tried to push the record to Mailchimp, despite the field being blank.

This post has been closed for comments. Please create a new post if you need help or have a question about this topic.

4 replies

Troy Tessalone
Zapier Orchestrator & Solution Partner
Forum|alt.badge.img+14
  • Zapier Orchestrator & Solution Partner
  • 34001 replies
  • August 7, 2025

Hi ​@KimV84 

Help links for Filters: https://zapier.com/apps/filter/integrations#help

Check the screenshot below for the filter condition operators to use.

 


Forum|alt.badge.img+1
  • Author
  • Beginner
  • 13 replies
  • Answer
  • August 7, 2025

Hi, I tried to use 'email field does not exist' and tested with a record where the email field on the trello card was blank.

However the filter ran and still tried to push the record to Mailchimp, despite the field being blank.


Troy Tessalone
Zapier Orchestrator & Solution Partner
Forum|alt.badge.img+14
  • Zapier Orchestrator & Solution Partner
  • 34001 replies
  • August 7, 2025

@KimV84 

For us to have context post screenshots showing how your Zap steps are outlined and configured in EDIT mode with the field mappings visible in the CONFIGURE tab.


Forum|alt.badge.img+1
  • Author
  • Beginner
  • 13 replies
  • August 7, 2025

I have somehow been able to resolve the issue now, thank you for your help!