Understand what protects your domain.
Practical explanations for the records and controls DomainShield Tower checks—what they do, why they matter, and how to improve them.
Choose a focused security check.
Start with one record or browse the full set of controls used in a DomainShield Tower health report.
Email authentication
4 toolsSPF records
Specify which servers are allowed to send email for your domain.
Learn more Email authenticationDKIM signing
Use cryptographic signatures to prove messages were sent by an authorized service.
Learn more Email authenticationDMARC policy
Tell receiving mail systems how to handle messages that fail authentication.
Learn more Brand protectionBIMI readiness
Make your verified brand logo eligible to appear in supported inboxes.
Learn moreMail infrastructure
3 toolsMX records
Define which mail servers receive messages for your domain.
Learn more Mail infrastructureTLS-RPT
Receive reports about failed encrypted mail delivery connections.
Learn more Mail infrastructureMTA-STS
Require sending systems to use authenticated TLS when delivering mail to you.
Learn moreWebsite and DNS
3 toolsSSL and TLS certificates
Encrypt browser connections and prove your website’s identity.
Learn more InfrastructureDNS health
Keep the naming system behind your website and email reliable.
Learn more Website securityWebsite security headers
Tell browsers how to defend visitors from common web attacks.
Learn moreThreat and reputation
2 toolsEmail deliverability
3 toolsEmail header analyzer
Inspect message headers for SPF, DKIM, DMARC, routing, and identity clues.
Learn more Email deliverabilityEmail verification
Check address syntax, mail routing, and disposable-domain signals without sending mail.
Learn more Email deliverabilityEmail deliverability test
Run a configuration preflight for the domain behind an email address.
Learn moreSee how your domain is doing.
Run a live scan and receive a plain-language security report.