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  2. DMARC - Wikipedia

    en.wikipedia.org/wiki/DMARC

    If the email passes the authentication, it will be delivered and can be trusted. If the email fails the check, depending on the instructions held within the DMARC record the email could be delivered, quarantined or rejected. DMARC extends two existing email authentication mechanisms, Sender Policy Framework (SPF) and DomainKeys Identified Mail ...

  3. Brand Indicators for Message Identification - Wikipedia

    en.wikipedia.org/wiki/Brand_Indicators_for...

    To implement BIMI, companies need a valid DMARC DNS record with a policy of either quarantine or reject, an exact square logo for the brand in SVG Tiny P/S format, [3] and a DNS TXT record for the domain indicating the URI location of the SVG file. The only supported transport for the SVG URI is HTTPS. [1] The BIMI DNS record is in the ...

  4. DomainKeys Identified Mail - Wikipedia

    en.wikipedia.org/wiki/DomainKeys_Identified_Mail

    DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect forged sender addresses in email (email spoofing), a technique often used in phishing and email spam. DKIM allows the receiver to check that an email that claimed to have come from a specific domain was indeed authorized by the owner of that domain. [ 1 ]

  5. Email authentication - Wikipedia

    en.wikipedia.org/wiki/Email_authentication

    The SPF verifier queries the Domain Name System (DNS) for a matching SPF record, which if it exists will specify the IP addresses authorized by that domain's administrator. The result can be "pass", "fail", or some intermediate result - and systems will generally take this into account in their anti-spam filtering.

  6. Authenticated Received Chain - Wikipedia

    en.wikipedia.org/wiki/Authenticated_Received_Chain

    However, a strict DMARC policy may block legitimate emails sent through a mailing list or forwarder, as the DKIM signature will be invalidated if the message is modified, such as by adding a subject tag or footer, and the SPF check will either fail (if the forwarder didn't change the bounce address) or be aligned with the mailing list domain ...

  7. Sender Policy Framework - Wikipedia

    en.wikipedia.org/wiki/Sender_Policy_Framework

    If the domain name has an MX record resolving to the sender's address, it will match (i.e. the mail comes from one of the domain's incoming mail servers). PTR: If the domain name for the client's address is in the given domain and that domain name resolves to the client's address (forward-confirmed reverse DNS), match. This mechanism is ...

  8. Email spoofing - Wikipedia

    en.wikipedia.org/wiki/Email_spoofing

    DomainKeys Identified Mail (DKIM) – an email authentication method designed to detect forged sender addresses in email (email spoofing), a technique often used in phishing and email spam. Domain-based Message Authentication, Reporting and Conformance (DMARC) – an email authentication protocol. It is designed to give email domain owners the ...

  9. Sender Rewriting Scheme - Wikipedia

    en.wikipedia.org/wiki/Sender_Rewriting_Scheme

    With respect to VERP, the local part (alice) is moved after her domain name (example.org), further adding a prefix (SRS0), a hash (HHH), and a timestamp (TT). This reflects an operational difference: Eventual bounces back to a VERP address are handled within the rewriting domain, and forged messages can at most unsubscribe some users, a kind of ...