Check your domain. Understand the risk. Fix the right problem.
Each tool stays focused on one result, explains it in plain language, and links the diagnosis to continuous monitoring.
Email security
Authentication and protection for the visible sender.
Email Spoofing Check
Can attackers impersonate your domain?
Open tool →SPF Record Checker
Check which servers are authorized to send email for your domain.
Open tool →DKIM Selector Check
Validate a DKIM public key using a domain and selector.
Open tool →DMARC Record Checker
Check how your domain handles unauthenticated email.
Mail delivery
Routing and availability for incoming email.
MX Record Check
Find the mail servers responsible for receiving email.
Open tool →SMTP Connectivity Test
Verify that your mail servers accept SMTP connections.
Open tool →Safe Open Relay Check
Safely check whether domain MX servers accept an external controlled recipient.
Open tool →STARTTLS Test
Check whether SMTP connections can be encrypted.
DNS & domain
Public records, delegation and DNS integrity.
TLS & transport security
Encrypted delivery and certificates.
TLS Certificate Check
Validate mail certificate hostname, chain and expiration.
Open tool →MTA-STS Check
Validate secure SMTP transport policy.
Open tool →TLS-RPT Check
Validate SMTP TLS failure reporting configuration.
Open tool →DANE / TLSA Check
Inspect published TLSA records for mail transport.
Fix the issue, then make sure it does not return.
DomainPulse compares normalized snapshots, detects meaningful changes, creates incidents, and sends recovery alerts.