Unable to configure vercel dns with resend

Question

I am a beginner with resend.

I am trying to configure the resend custom domain with the pre-hosted next.js project to send email in vercel. I have added the DNS record copied from the resend and past it in the vercel Domains and then tried to configure the resend domain in resend but every time I got failure. The status is going to be in failure every time I try to configure. I have also created multiple domain and try the same process but not work for me.

Vercel DNS Record
Debugging Image

I have tried to get support from the internet but no one is getting satified.

Steps I have followed:
1. Create a resend API Key
2. Add API key in nextjs project
3. Create custom domain in vercel
4. Add TXT and MX record in DNS record in Domain section on Vercel.
5. Press the verified button in resend custom domain

After 2 days the status is changed to failure from pending.
I am trying to solve this problem from 1 weeks