Thanks for explaining about bulk SPF record on server.
DKIM record are also protect from spamming, you can easily enable them from WHM panel.
1. Login to WHM.
2. Click on "Modify an account".
3. Here you have to check the box "Enable DKIM on this account." for DKIM and "Enable SPF on this account." for SPF record.
4. At last click on "Save".
You can also do enable DKIM and SPF records in command line.
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