The record you added is not that outlined in [Support Guide] "another site is using this domain" Verifying domain ownership for Netlify production domain
You’ve added
$ host -t txt key2max.com
key2max.com descriptive text "verified-for-netlify"
but the required record is non-existent.
$ host -t txt verified-for-netlify.key2max.com
Host verified-for-netlify.key2max.com not found: 3(NXDOMAIN)