Domain-based Message Authentication, Reporting, and Conformance (DMARC)
Domain-based Message Authentication, Reporting, and Conformance (DMARC)
- April 21, 2021
- Posted by: Nicola Selenu

DMARC is a technical specification that allows Message Senders and Message Receivers to cooperate and thereby better detect when messages don’t actually originate from the Internet domain they claim to have been sent from. It does this by allowing the Domain Owner to indicate they are using email authentication on the messages they send, optionally requesting that messages that fail to authenticate be blocked. Message Receivers honor these requests (unless there is a local policy overriding this action), and send reports on all the messages – whether or not they pass email authentication – to the Domain Owner. For more information please review the DMARC Overview. The specification has been published as an Informational document by the IETF as RFC7489.
Author:Nicola Selenu
Email Service Providers Handbook
The most comprehensive “Handbook of Email Service Providers“!
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SMTP COMMANDS
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Deliverability Glossary
The most comprehensive Email Deliverability and Marketing Glossary!
- Term: Authentication
- Term: Domain Owner
- Term: Local Policy or Local Policy Override
- Term: RFC7489
- Term: Domain Message Authentication Reporting & Conformance (DMARC)
- Term: Internet Engineering Task Force (IETF)
- Term: Email Service Provider (ESP)
- Term: Deliverability
- Term: SpamAssassin
- Term: Extended Simple Mail Transfer Protocol (ESMTP)
- Term: Simple Mail Transfer Protocol (SMTP)
- Term: Domain Name System (DNS)
Domain-based Message Authentication, Reporting, and Conformance (DMARC)
Domain-based Message Authentication, Reporting, and Conformance (DMARC)
- April 21, 2021
- Posted by: Nicola Selenu


DMARC is a technical specification that allows Message Senders and Message Receivers to cooperate and thereby better detect when messages don’t actually originate from the Internet domain they claim to have been sent from. It does this by allowing the Domain Owner to indicate they are using email authentication on the messages they send, optionally requesting that messages that fail to authenticate be blocked. Message Receivers honor these requests (unless there is a local policy overriding this action), and send reports on all the messages – whether or not they pass email authentication – to the Domain Owner. For more information please review the DMARC Overview. The specification has been published as an Informational document by the IETF as RFC7489.
- Term: Authentication
- Term: Domain Owner
- Term: Local Policy or Local Policy Override
- Term: RFC7489
- Term: Domain Message Authentication Reporting & Conformance (DMARC)
- Term: Internet Engineering Task Force (IETF)
- Term: Email Service Provider (ESP)
- Term: Deliverability
- Term: SpamAssassin
- Term: Extended Simple Mail Transfer Protocol (ESMTP)
- Term: Simple Mail Transfer Protocol (SMTP)
- Term: Domain Name System (DNS)
Author:Nicola Selenu
Email Service Providers Handbook
The most comprehensive “Handbook of Email Service Providers“!
SPAMASSASSIN RULES
All SpamAssassin rules in one place, EXPLAINED!
SMTP COMMANDS
& REPLY CODES
All SMTP/ESMTP commands and reply codes in one place, EXPLAINED!
Free DNS Tool
Check the DNS records of your domain with our free DNS tool.
Deliverability Glossary
The most comprehensive Email Deliverability and Marketing Glossary!
- Term: Authentication
- Term: Domain Owner
- Term: Local Policy or Local Policy Override
- Term: RFC7489
- Term: Domain Message Authentication Reporting & Conformance (DMARC)
- Term: Internet Engineering Task Force (IETF)
- Term: Email Service Provider (ESP)
- Term: Deliverability
- Term: SpamAssassin
- Term: Extended Simple Mail Transfer Protocol (ESMTP)
- Term: Simple Mail Transfer Protocol (SMTP)
- Term: Domain Name System (DNS)