Schedule a 15 Minute Triage Call Today
Three stnadard are key to filtering spam messages: DomainKeys Identified Mail (DKIM), Sender Policy Framework (SPF) and Domain-based Message Authentication, Reporting and Conformance (DMARC).
DKIM uses asymmetric cryptography to prevent email spoofing. A digital signature is added to an email to verify the message was not altered after it was sent. If the signature doesn't match the email domain's public key, it is blocked. If it does match, it is delivered.
SPF verifies an email came from its source and is authorized to send an email from that domain. If verified, the email gets delivered. If not, the email is blocked.
DMARC extends DKIM and SPF. Using DMARC, domain owners can publish their DKIM and SPF requirements, as well as specify what happens when an email fails to meet those requirements, such as reporting back to the sending domain.
Page updated
Report abuse