HI maurizioc92956636 ,
There is a better way to do this
Your current design is resource exhaustive as it will unnecessarily pull all recipients from database and then tries to reconcile the data from file.
Using this new design you need to only work on data in your file.
So for explanation purposes, I have used a file with three columns and I'll be using email as the column for reconciliation.
Connect the file loading activity to Enrichment activity.

On the enrichment activity, go to Reconciliation tab and enable the option "identify the document from working data".
Select the targeting dimension as "Recipient" and then define the reconciliation keys as well. In my keys it was the email column

Hit Ok and Save the workflow.
This will output only those records from file which had a matching recipient inside database.
Regards,
Vipul