Learn
Everything Email Health Pro checks, explained in plain language. Start with the authentication trio — SPF, DKIM, and DMARC — then move on to the rest.
Authentication
-
DKIM explained: how cryptographic signing keeps your email trusted
DKIM signs every message you send with a private key, and publishes the public key in DNS so receivers can verify the signature. Here's how it works and how to set it up.
-
DMARC policy: protect your domain from spoofing
DMARC tells receivers what to do when a message claims to be from you but fails authentication. Here's how to read a DMARC record, pick the right policy, and read the reports.
-
SPF record explained: how mail servers prove they're allowed to send
SPF is the first authentication check most mailbox providers run. Here's what an SPF record is, how to write one for your domain, and the gotchas that quietly break it.