Learn about DMARC, SPF, and DKIM
Welcome to DMARCPal's Learn blog. Check our posts to discover and learn more about DMARC, SPF, DKIM, and how to get the most value of your DMARCPal subscription.
When another mail server delivers a message to your domain, STARTTLS can encrypt the connection. Without an additional policy, that encryption is usually opportunistic: the sender tries TLS, but a network attacker may be able to remove the STARTTLS capability or redirect the SMTP connection to ano...
DMARC, DKIM, and SPF are about message identity.
They help receivers decide whether mail claiming to be from your domain is authentic and aligned.
They do not tell other mail servers how to protect SMTP delivery to your inbound MX hosts.
That gap is where MTA-STS and TLS-RPT fit.
I...
