An SPF record (Sender Policy Framework) is a type of DNS record that identifies which email servers are authorized to send email on behalf of a particular domain. This helps to prevent email spoofing, which is when an attacker sends an email that appears to come from a legitimate sender but is actually from a malicious source. Checking an SPF record is a simple process that can be done using a variety of online tools.
SPF records are important because they help to protect your domain from being used to send spam or phishing emails. They can also help to improve your email deliverability, as some email providers will reject emails that do not have a valid SPF record.