An SPF record is what?
SPF is a DNS TXT record called a sender policy framework record, which lists the servers permitted to send emails from a particular domain. Because it uses TXT, administrators can edit the text in the DNS using this record.
The “from” (address) of emails was not authenticated by the SMTP (simple mail transfer protocol) before the SPF record. That made it easier for thieves to impersonate a reliable sender to defraud a victim. In addition, Spoofers coerced victims into sharing sensitive information or taking specified actions against their finances or interests by posing as a bank or government agency. The SPF record was developed to add authentication capability and reduce these risks.