Free tool no sign-up

Check your domain's e-mail security

SPF, DKIM, DMARC, CAA, MTA-STS and DNSSEC in one click. For every missing or broken record we give you the exact value to paste into your DNS panel — keep your mail out of spam and stop spoofing.

Only public DNS records and your site's SSL certificate are read. The domain you check is not stored.

Let us run these checks every day

Teknik Danışman continuously monitors your domains, SSL certificates, websites and backups, and alerts you when a record breaks, a certificate is about to expire or a backup is missed — in one panel with your hardware, license and staff inventory.

Start free See plans

What do these records do?

SPF

Lists which servers may send e-mail for your domain. Without it — or if it is too loose — anyone can send mail as you.

DKIM

Digitally signs your outgoing mail so receivers can verify it came from you and was not altered.

DMARC

Tells receivers what to do with mail that fails SPF/DKIM and sends you reports. Gmail and Yahoo have required DMARC from bulk senders since 2024.

CAA, MTA-STS, DNSSEC

CAA limits who may issue SSL certificates for your domain; MTA-STS enforces encrypted delivery of inbound mail; DNSSEC signs your DNS answers against spoofing.