Hi @TheG, Hubspot doesn’t like a search for Email “not equals” (as this would return all users).
For the search to work you could first split up your items in batches of 1, then run the search (having the Always Output Data setting of the Hubspot node enabled), merge the results back together and then check if an email has been found. Like so:
This workflow will return a list with your incoming items next to the respective Hubspot results, allowing you to proceed based on the result:
Hope this helps!