FREE TOOLS

Free tools for deliverability.

Deliverability checkers, DNS tools, and generators used to keep sending domains healthy — free to run, unlimited.

MOST USED

Email Deliverability Checker

The one-click audit: SPF, DKIM, DMARC, SSL, MX, and blacklists for any domain in a single run.

Email Authentication & DNS

Email Deliverability Checker

Complete domain audit in one click: SPF, DKIM, DMARC, SSL, and blacklist status.

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SPF Checker

Check existing SPF records or generate new ones for your domain.

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SPF Generator

Create valid SPF records to prevent email spoofing and improve deliverability.

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DKIM Checker

Look up existing DKIM records and validate your email signing setup.

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DKIM Generator

Generate DKIM key pairs and canonical DNS records for your domain.

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DMARC Checker

Inspect existing DMARC policies and see how reports flow back to you.

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DMARC Generator

Create DMARC policies with the right p, rua, and pct settings in one step.

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CNAME Lookup

Check CNAME records for custom tracking domains and subdomains.

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Blacklist Checker

See if your domain or IP is listed on major email blacklists (RBL/DNSBL).

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SSL Checker

Verify SSL/TLS certificates on your email domains and sending servers.

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Spam Score Checker

Test email content against SpamAssassin filters and get fix recommendations.

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Campaign Ops Tools

Spintax Generator

Turn seed copy into valid spintax for unique variations at scale.

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Ops Builder

Generate a complete cold-email ops folder — DNS, inboxes, domains — as a ready bundle.

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Buying Guide

Work out how many domains and mailboxes you actually need before you buy.

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