The FBI has recently issued a warning about a new strain of ransomware known as the BlackCat Ransomware (Noberus and AlphaV). Free BlackCat ransomware prevention guide with DMARC.

Yes, you can set up DMARC without SPF. It is a possibility that you can explore, that a lot of vendors and domain owners do exercise in real-time.

DMARC, SPF and DKIM can help you defend your domain against phishing and spoofing attacks, and other forms of online threats. We help you onboard the protocols with ease to bypass these attacks without compromising on deliverability.