Re:FastMail loses customers, faces calls to move over anti-e...
by sergiosgc on Monday February 25, 2019 @12:28PM
(#19247388)
SPF authenticates the envelope-from domain, while DKIM authenticates the header-from domain. They're both useful, specially coupled with DMARC.
DMARC authorizes recipient servers to outright refuse email from your domain if it does not contain a valid DKIM signature, and/or comes from a non-authorized IP.
In short, SPF+DKIM+DMARC prevent email spoofing from your domain, protecting you from backscatter and reputation degradation.
DMARC authorizes recipient servers to outright refuse email from your domain if it does not contain a valid DKIM signature, and/or comes from a non-authorized IP.
In short, SPF+DKIM+DMARC prevent email spoofing from your domain, protecting you from backscatter and reputation degradation.