Hello @fruits,
As you mention about the Date format 2024-11-13 (YYYY-MM-DD)
Try to use YYYY-MM-DD on the second parameter of formatDate.
For debugging purposes initially try with a single condition like this, Make sure you change the formula according to Make’s syntax.
AND({Send-Date} < formatDate(now; YYYY-MM-DD))
Then use that Mailbox after you successfully get a response of dates.
If Mailbox doesn’t work properly, try also to remove the quotation mark (') from that value of Mailbox.
I hope this helps you.
P.S.: Always search first, Check Make Academy. If this is helpful, mark it as a solution 
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