DKIM is a process to validate sending domain names associated to email messages through cryptographic authentication. DKIM creates two key for the this process. The private key is used to siginning the mail in the sender side for ensuring the identity of the sender and publickey will stored in the DNS zone for validating the record which will performed by recipient end.
dig default._domainkey.lintechops.com txt +short
dig default._domainkey.lintechops.com txt +short
"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApXQepJtdyRLBsNRiDItdMtR66+vQJHLlbUiwBTPGbra+j9VCS87nZbignkw+Hftz/ihffHt1bQ7niX4BLK37uCNPG5wkY+1iYJenxOGkKg/TYPO9EcfEaTqePouL8Omy0wDCW+D6Y5Iv8OyuDOng94vuy/t+BBkeUhydQgw/Z/ZL/flfd0b39S18RXVI/bfvt" "rc8C+06B8mLnG/ac/+2Y8lwDjxp+cF9Pd+DIoGE7kmPlSrVqAaqoqgpbneZ3Z6ZEVBxFAdl6RfqxWwGqSvK9YmquE8dNpeybOtl9n+ztOkwW3lltULuHzL55y67OjWIUv8a7wdhjhY8/NXmqVG3NQIDAQAB;"