SPF and DMARC records help with getting your emails through to your customers.
Here is how to set this up with CloudFlare.
Type:TXT Domain: your-domain.com Value: v=spf1 +a +mx +ip4:x.x.x.x -all
DMARC (Domain-based Message Authentication Reporting and Conformance) – prevention of phishing and spoofing.
Type:TXT Domain: _dmarc.your-domain.com Value: v=DMARC1; p=reject; sp=none; rf=afrf; pct=100; ri=86400
Should look something like this:
If all goes well, you should get something like this in CloudFlare