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Free Email Tools
Check email addresses, clean email lists, review sender domains, verify authentication records, check blocklists, and test campaign content before you send. Each tool shows the check results and links to the related guide so you can set up or review your email marketing.
Browser checks and live-message checks Specific fix guidance AI-readable markdown
2 tools
List Quality
Check addresses and subscriber lists before they cause bounces, complaints, or wasted sends.
Single Address Email Checker Check one email address for valid format, domain mail records, disposable email services, role inboxes, typo risk, and deliverability warnings.
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CSV or Paste Bulk Email List Checker Paste or upload a list to find invalid, duplicate, disposable, role-based, typo-prone, and domain-risk addresses before importing subscriber records.
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12 tools
Email Authentication
Check the public DNS records that help inboxes verify your sending domain.
DNS Record SPF Checker Check a domain's SPF record, find missing or duplicate records, estimate DNS lookup usage, and see whether the ending policy is safe for bulk sending.
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Selector Lookup DKIM Checker Check a DKIM selector for a sending domain, follow common CNAME setups, find missing or revoked keys, and learn what to fix in DNS or in your email delivery service.
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Policy Lookup DMARC Checker Check a domain's DMARC policy, reporting addresses, alignment settings, percentage rollout, and common mistakes that can leave the domain unprotected.
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Mail Routing MX Record Checker Check whether a domain has mail server records, see which hosts receive mail for the domain, and learn what to fix when email cannot be received.
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Message Headers Email Header Analyzer Paste original email headers and review From, Return-Path, DKIM signing domain, SPF, DKIM, DMARC, routing, and alignment clues in plain language.
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Brand Logo DNS BIMI Checker Check a domain's BIMI DNS record, logo URL, certificate URL, and the DMARC enforcement signal many inboxes expect before they show a brand logo.
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TLS Policy MTA-STS Checker Check the DNS signal for MTA-STS and see the policy URL your mail administrator should verify before enforcing secure inbound mail delivery.
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TLS Reports TLS-RPT Checker and Generator Check a domain's SMTP TLS reporting record and generate a simple TLS-RPT record if secure-delivery reports are not configured.
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STARTTLS Readiness SMTP TLS Checker Review a domain's mail servers, MTA-STS signal, and TLS reporting setup so you know what a real SMTP STARTTLS handshake check still needs to confirm.
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Record Builder SPF Record Generator Generate a starter SPF record from approved senders such as Google Workspace, Microsoft 365, Amazon SES, SendGrid, Mailgun, Postmark, Brevo, Resend, and exact IP values.
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Policy Builder DMARC Record Generator Generate a starter DMARC record with a policy, reporting address, alignment defaults, rollout percentage, and safe publishing guidance.
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IP Identity Reverse DNS PTR Checker Check reverse DNS for an IPv4 address or a domain's mail-server IPs, then confirm whether the PTR hostname resolves back to the same IP.
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4 tools
Reputation
Check sender-domain and mail-server signals that can affect whether inboxes trust your email.
Sender Readiness Email Domain Health Checker Check whether a sending domain has the core DNS, mail, SPF, DKIM discovery, DMARC, and reputation signals needed before email marketing sends.
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Reputation Lookup Email Blacklist Checker Check a domain's mail-server IPs against common DNS-based blocklists and see the next steps if a sending IP is listed.
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Real Email Test Email Deliverability Tester Send a real test email to a temporary Mailrith address. Get a plain-English report on authentication, alignment, sending IP, unsubscribe, links, content, and what to fix before a broad send.
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Sending IP IP Reputation Checker Check a sending IP or a domain's mail-server IPs for public blocklist signals, PTR identity, resolver limits, and reputation next steps.
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6 tools
Email Content
Check email copy, links, subject lines, and compliance signals before you send a campaign.
Content Review Email Spam Checker Check the subject line, preview text, body copy, links, unsubscribe signals, and common content risks before you send a campaign.
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One-Click Unsubscribe List-Unsubscribe Header Checker Paste original email headers and check whether List-Unsubscribe and List-Unsubscribe-Post are set up for one-click unsubscribe.
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Inbox Copy Email Subject Line Tester Check a subject line for length, clarity, loud formatting, risky phrases, mobile clipping risk, and practical rewrite guidance.
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Inbox Snippet Email Preview Text Checker Check whether preview text supports the subject, avoids repetition, works on mobile, and does not show random footer or unsubscribe copy.
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Message Size HTML Email Size Checker Paste HTML email code or copied message content to check byte size, Gmail clipping risk, script or form usage, image count, and cleanup steps.
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Links and CTAs Email Links Checker Paste email copy or HTML to analyze HTTP links, URL shorteners, URL mismatches, high link counts, and too many destination domains before you send.
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