DNSlens

DKIM checker

DKIM publishes a public key in DNS so receivers can verify a signature on the message itself. The selector is the part people get stuck on: it is not in DNS to be discovered, it is named in the message's own signature header.

A selector cannot be discovered from DNS — it is named in the DKIM-Signature header of a signed message, as s=. Leave the box empty and DNSLens will try 15 selectors that providers commonly use.

Try one of these