Same-Domain Phishing refers to phishing campaigns where each message fraudulently uses a domain in the address portion of the RFC5322.From header without permission of the owner. This is one of the most effective types of phishing if it isn’t prevented with DMARC or other email authentication methods. By contrast, when a targeted domain implements DMARC and DMARC-enabled recipients can detect the impostors easily. Bad actors are then forced to use a different domain from the one they wish to impersonate, and this mismatch makes it easier for the email filters used by message recipients to detect these messages too.

Same-Domain Phishing refers to phishing campaigns where each message fraudulently uses a domain in the address portion of the RFC5322.From header without permission of the owner. This is one of the most effective types of phishing if it isn’t prevented with DMARC or other email authentication methods. By contrast, when a targeted domain implements DMARC and DMARC-enabled recipients can detect the impostors easily. Bad actors are then forced to use a different domain from the one they wish to impersonate, and this mismatch makes it easier for the email filters used by message recipients to detect these messages too.