Selector
A label in a DKIM record’s name that lets a domain publish more than one signing key at once, so a sender can add or rotate keys without breaking the ones already in place. See DKIM | Guidelines for how selectors are used in practice.
A label in a DKIM record’s name that lets a domain publish more than one signing key at once, so a sender can add or rotate keys without breaking the ones already in place. See DKIM | Guidelines for how selectors are used in practice.