updating DNS settings because I changed my host server and getting errors

I need four DNS records added to my domain. The advanced DNS editor rejects them with “please enter a valid host name” because the names contain underscores, which is required for DKIM and DMARC records.

I am trying to add these three CNAME records:

Host: hostingermail-a._domainkey
Points to: hostingermail-a.dkim.mail.hostinger.com
Host: hostingermail-b._domainkey
Points to: hostingermail-b.dkim.mail.hostinger.com
Host: hostingermail-c._domainkey
Points to: hostingermail-c.dkim.mail.hostinger.com

And this TXT record:

Name: _dmarc
Value: v=DMARC1; p=none; adkim=r; aspf=r