Fighting spam and phishing emails is a never-ending battle, in which one of the key players is the DKIM record. It will guarantee the sender of a main, based on the link with the domain name, and will serve as proof that the email was not forged on the way.
What is the DKIM record?
The DKIM (Domain Keys Identified Mail) record is a DNS record (TXT DNS record) that a DNS administrator of a domain uses to set proof that the emails sent from the domain are legit through cryptographic authentication. On the other hand, the receiver will also use the DKIM record by performing a DNS query on the domain to verify the sender using the information in the header.