Check your domain's DKIM signing configuration. We'll probe common selectors or check a specific one you provide.
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing emails. Receivers use the public key published in your DNS to verify messages weren't tampered with in transit. It's one of the three pillars of email authentication alongside SPF and DMARC.
Monitor DKIM, SPF & DMARC continuously
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