When DKIM signing is configured, which DNS record must be updated to load the DKIM public signing key?
A. AAAA record
B. PTR record
C. TXT record
D. MX record
When DKIM signing is configured, which DNS record must be updated to load the DKIM public signing key?
A. AAAA record
B. PTR record
C. TXT record
D. MX record