DKIM keys live at <selector>._domainkey.<domain>. Enter a domain plus the selector your mail platform uses.
<selector>._domainkey.<domain>
Common selectors to try: googleselector1selector2defaultk1k2s1s2mailemail
google
selector1
selector2
default
k1
k2
s1
s2
mail
email
This tool is a one-shot check. PhishFence watches your domain 24/7 for DMARC changes, new lookalike registrations, and spoofing attempts.