Web, domains and email
DMARC
Abbreviation for Domain-based Message Authentication, Reporting and Conformance
In short and in plain language
DMARC is a record in the domain name system.
It tells recipients what to do with emails that fail certain checks. These checks concern the sender and the digital signature.
The owner can also ask for reports. They show who sends mail in the name of the domain.
This makes it harder to misuse your own sender name. It can also improve delivery.
Definition
DMARC is a record in the Domain Name System that tells recipients how to handle emails that fail SPF and DKIM checks. It can also request reports on who sends mail in the name of the domain. This makes misuse of your own sender name harder and can improve delivery.