I try to verify my Domain in RESEND by adding RESEND DNS record to Vercel as they ask to do so, and i keep having a failed error saying that they can’t detect DNS record.
I’ve found the problem, i any of you got the same problem then it is a problem of SPF, you need to combine the 2 spf (the one from improvMX and the one from resend) with an empty or @ name, delete the mxImprov spf, keep the resend dns as it was.