The formula seams to work in airtable, but the search module does not always return correct result.
for ex. same email was sent 2 days in a row, which should not be possible because 2 days difference can be only on one date :confused:
If you can take a screenshot of the table that would be great, I have some doubts about the formula that maybe would fix it.
However, if the formula is returning the correct results in Airtable, maybe it would be best if you create a view that filters on the result of this formula (where the result = 1) and let Integromat trigger on this view instead of the search formula.