Free Tools
Email Deliverability Tools
Free tools to audit, validate, and diagnose your email setup. No login required.
SPF Checker
Look up your domain's SPF record, validate syntax, detect DNS lookup limit issues, and see which senders are authorized to send on your behalf.
- Check SPF record presence
- Validate syntax & structure
- Detect 10-lookup limit risk
- Review authorized senders
Domain
v=spf1 include:_spf.google.com include:sendgrid.net ~all
DMARC Checker
Check whether your domain has a DMARC record, review the policy mode, and identify alignment settings that affect how failing emails are handled.
- Detect DMARC record presence
- Review policy mode (none / quarantine / reject)
- Check rua / ruf reporting addresses
- Inspect subdomain & alignment settings
Domain
Policy is set to none — emails are not being rejected or quarantined.
DKIM Checker
Enter your domain and selector to retrieve and validate your DKIM public key record. Confirm your signature is present, correctly formatted, and usable by receiving servers.
- Look up DKIM TXT record by selector
- Validate key format & length
- Detect missing or malformed records
- Confirm signature is active
Domain
Selector
BIMI Checker
Verify your BIMI record is published correctly so your brand logo can appear in supported email clients. Check SVG location, VMC requirements, and policy alignment.
- Check BIMI TXT record presence
- Validate SVG logo URL
- Review VMC certificate status
- Confirm DMARC enforcement for BIMI eligibility
Domain
Logo eligible to display in supported clients
Blacklist Checker
Check whether your domain or sending IP appears on major email blacklists. Identify listing status across multiple blocklists and take action before deliverability is impacted.
- Check domain & IP against blocklists
- See listing status per provider
- Detect active listings vs clean
- Prioritize by severity
Domain or IP
HTML Email Checker
Paste your HTML email code and check for common rendering issues, unsupported CSS, missing alt text, broken links, and other problems that affect inbox display across clients.
- Detect unsupported CSS properties
- Check for missing alt attributes
- Flag common rendering issues
- Review structure & encoding
Paste HTML Email Code
SPAM Words Checker
Paste your email subject line or body copy to scan for words and phrases commonly associated with spam filters. Reduce false positives before your campaign goes out.
- Scan subject line & body text
- Flag high-risk spam trigger words
- Review by severity category
- Improve filter pass rate
Subject or Body Text
3 spam trigger words found
Email Verification Tool
Check whether an email address is valid, the mailbox exists, and the domain has active MX records. Reduce bounce rates by verifying contacts before sending.
- Validate email format & syntax
- Check MX record & mail server
- Detect role-based addresses
- Identify risky or undeliverable emails
Email Address
Disposable Email Checker
Check whether an email address belongs to a disposable or temporary email service. Protect your list quality and avoid wasting sends on addresses that expire.
- Detect known disposable providers
- Identify single-use domains
- Protect list hygiene
- Reduce fake signups
Email Address
This address belongs to a known disposable email provider. Avoid adding to your list.
Need more than a free check?
Our team diagnoses the full picture — infrastructure, reputation, authentication, and sending behavior — and fixes what the tools surface.