DomainKeys Identified Mail — an email authentication standard that allows the receiving mail server to verify that an email was actually sent by the domain it claims to be from, using cryptographic digital signatures.
DomainKeys Identified Mail — an email authentication standard that allows the receiving mail server to verify that an email was actually sent by the domain it claims to be from, using cryptographic digital signatures.
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DKIM adds a digital signature to every outgoing email, like a wax seal on a letter. When your email server sends a message, it creates a unique cryptographic signature based on the email's content and attaches it to the email header. The receiving server uses the sender's published public key to verify the signature.
If the email was modified in transit or sent from an unauthorized server, the DKIM signature won't match, and the receiving server can flag or reject the message. DKIM is a critical defense against email spoofing and phishing.
DKIM works alongside SPF and DMARC to form a comprehensive email authentication framework. Together, these three protocols significantly reduce the ability of attackers to send emails that impersonate legitimate domains.
IsThisAScam checks DKIM signatures as part of its email authentication layer. When you paste a suspicious email, the tool examines whether the DKIM signature is valid, helping determine if the email was genuinely sent from the claimed domain or was spoofed.