How to set DomainKeys in DNS settings?

Question

Domain Name System

I'm using the host's DNS.
The DNS settings include:
dkim._domainkey TXT v=DKIM1; k=rsa; p = MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrJWySAmZcDcNE9dgTStG9 / mX5IfDcFZS4RAcWzijYZHYL991kNYfOrQUpdtPYqCu5i2kbp9v6NXKAT7drtwdu3QCW74n36hw4C4C0f32Ry / AaO3ajf2EltQMkjly1Vq
Tested:
========================================= =================
Summary of Results
============================== ============================
SPF check: pass
DomainKeys check: neutral
DKIM check: pass
Sender-ID check: pass
SpamAssassin check: ham
Found that DomainKeys is not set.
What entry needs to be made for DomainKeys to work?