InfraSuite Tools

Cold email tools

A focused collection of deliverability and cold-email tools for domain checks, mailbox workflows, and campaign prep. Pick a tool to open it in its own workspace.

Campaign prep

Spintax preview

Expand and preview spintax lines before you push them into a sequencer.

Spam word checker

Score subject lines and body copy against 500+ spam triggers by risk and category.

DNS tools

Domain health check

Run MX, SPF, DKIM, DMARC and blacklist checks in a single report.

MX lookup

Confirm mail routing and Microsoft 365 MX readiness.

SPF checker

Validate SPF syntax, DNS lookup budget, and M365 authorization.

DMARC checker

Analyze DMARC policy with cold-email-specific guidance and checks.

DKIM checker

Verify selector records, CNAME chain resolution, and key strength.

Blacklist checker

Check domain/IP listing status across major DNSBL providers.