CPanel and WHM make the process of setting up SPF and DKIM fairly straightforward.
To open the CPanel of a particular user from WHM, typing Account in the top left search box shows "List Accounts" - Home -> Account Information -> List Accounts. There, clicking on the CPanel icon opens up CPanel for that user account.
Within CPanel of the relevant domain, typing DKIM brings up the required link - Home -> Email -> Authentication
A single click on that page enables or disables DKIM and or SPF.
(Actually I had run the certificate creation etc using scripts under cpanel running as root user and so on, but most probably all that was not necessary.)
To open the CPanel of a particular user from WHM, typing Account in the top left search box shows "List Accounts" - Home -> Account Information -> List Accounts. There, clicking on the CPanel icon opens up CPanel for that user account.
Within CPanel of the relevant domain, typing DKIM brings up the required link - Home -> Email -> Authentication
A single click on that page enables or disables DKIM and or SPF.
(Actually I had run the certificate creation etc using scripts under cpanel running as root user and so on, but most probably all that was not necessary.)