Tag: Domain-based Message Authentication

Preventing Email Forgery Part Three: DMARC

December 19, 2023

In our previous two posts in this series, we examined how SPF and DKIM can help limit forged email messages by looking at the IP address and validating if the message was sent from an approved source based on digitally signed messages. We found that while SPF and DKIM can effectively prevent email fraud and […]

DMARC: The State of Domain-based Email Authentication – Part 2

September 11, 2017

Building a safer email ecosystem with DMARC In our previous post, we described two techniques for authenticating an email sender: Sender Policy Framework (SPF), IETF RFC 7208, which verifies if the sending MTA is indeed authorized to send mail on behalf of a domain; and DomainKeys Identified Mail (DKIM), IETF RFC 6376, where a domain shows “ownership” of a mail […]