How do I Enable Domain Keys and SPF for my domain name ?
you can set up Domain keys by Login to your Cpanel>> Click Email authentication under Mail feature >> Click on Enable Domain keys.
For creating SPF Login to your cpanel>>Click Email Authentication under Mail feature >> Click on Enable SPF.
Then Login to your WHM >>DNS Functions>> Edit DNS Zone>>Click on the Domain for which you enabled DKIM and SPF >> where you can view the Domain keys entries and SPF entries in the DNS zone.