SPF
Waiting for a domain
SPF tells receiving mail systems which services are allowed to send email for your domain.
They help protect against forged sender addresses and help legitimate messages reach the inbox. If you arrived here from an email banner, a check did not fully pass for that message. That is a reason to investigate, but it does not automatically mean the message is malicious.
The three checks behind email delivery
SPF
SPF is a guest list. It tells receiving email systems which services are allowed to send messages for a domain.
DKIM
DKIM is a tamper check. It adds a digital signature so receiving systems can tell that a message came through an approved service and was not changed.
DMARC
DMARC is the instruction card. It tells receiving systems what to do when a message fails the SPF or DKIM checks.
Check a domain
Enter the domain shown after the @ in an email address. The checker looks at its public email delivery and security settings.
Domain check results
Good Needs attention Not found
DKIM
Waiting for a domain
DKIM adds a digital signature to your messages so receiving systems can check they were not changed.
DMARC
Waiting for a domain
DMARC tells receiving systems what to do when a message fails these checks and helps stop impersonation.
Need help improving your email delivery?
We can help you understand the results, review your email setup and put the right records in place.