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71 tools · 12 groups
Test SMTP connections, ports, and authentication to diagnose delivery issues.
A disposable email checker helps you detect throwaway email addresses so you can protect signups, reduce spam, and keep your user data clean.
Validate your domain's SPF record with our free SPF Checker tool.
Analyze email headers to trace origin, verify SPF/DKIM/DMARC, and detect spam or spoofing.
Check your domain's MX records and mail server configuration instantly. Get mail exchange servers, priority values, IP addresses, ASN, plus A, AAAA, and CNAME records for complete email and domain infrastructure visibility.
Generate DMARC records to help secure your domain with our free tool. Quickly set up DMARC policies and defend your domain against spoofing or phishing attacks.
Check your domain's DMARC record in seconds with our free lookup tool.
Look up a domain's DKIM record by selector and verify its email signing setup. Retrieve the published key from DNS, break down the record tags, and spot missing or malformed DKIM configuration.
Enter a mail server hostname to discover every domain that receives its email through it. Search with exact matching or wildcards for security research and threat analysis.
Check the validity of multiple email addresses at once to keep your lists accurate and up to date.