06/19/2026
Your email needs "ID" at the inbox door. Since spam and phishing have become major problems, email providers have put more strict systems in place to check who’s sending the message.
Email authentication is how inboxes check that your email really came from your domain, and the main pieces are SPF, DKIM, and DMARC.
They usually live in your domain’s DNS (Domain Name System) settings as small TXT records, and they help mail providers decide whether your emails can be trusted.
Luckily you do not need to fully understand every technical detail. But if website forms, newsletters, or business emails are ending up in spam or going missing, authentication is one of the first places to check.
Read more about how it works here (includes a link to a great free tool to check your authentication!): https://chunkysquirrel.com/how-to-fix-email-delivery-issues/