Free email deliverability checker
Find out why your emails go to spam.
Check SPF, DKIM, DMARC, DNS, blacklists, SMTP TLS, BIMI, MTA-STS and TLS-RPT in one report.
- No signup required
- DNS-only checks
- Free report
How it works
From domain to diagnosis in seconds
No account or email access needed. Paste your domain and get a full DNS security report with a prioritised fix list.
Enter your domain
No account or email access needed — just your domain.
MXFend scans your setup
Authentication, reputation, transport security and brand trust — DNS only.
Get a prioritised fix list
A scored report with clear, ranked steps to fix first.
Free Email Security Tools
Everything you need to check your email setup.
Most complete
Email Security Score
Complete domain report for authentication, reputation, and transport security.
Check
SPF Checker
Check whether your SPF record is present and safe.
Check
DKIM Checker
Validate a DKIM selector and DNS record.
Check
DMARC Checker
Check your DMARC policy and enforcement.
Check
MX Checker
Validate your mail exchanger records.
Check
Blacklist Checker
Check whether your mail server IP is listed.
Check
SMTP TLS Checker
Test STARTTLS and TLS certificate health.
Check
BIMI Checker
Validate your BIMI logo and DNS record.
Check
MTA-STS Checker
Validate your MTA-STS DNS and HTTPS policy.
Check
TLS-RPT Checker
Validate your TLS reporting DNS record.
Check
SPF Lookup Visualizer
See your SPF record's full include/redirect tree and DNS lookup budget.
Check
SPF Optimizer
Generate a safer, cleaner SPF record without guessing which senders are active.
Check
DMARC Policy Visualizer
See which DMARC policy actually applies to your domain, subdomains, alignment, and reports.
Check
DKIM Inspector
See exactly what DKIM public key is published and whether it's structurally safe to use.
Check
Email Header Analyzer
Paste raw email headers to understand SPF, DKIM, DMARC, ARC, routing, and sender identity.
Check
BIMI Inspector
Check your BIMI record, logo, SVG Tiny PS compatibility, evidence document, and DMARC readiness.
Check
Knowledge base
Email deliverability guides
Spam troubleshooting
Gmail delivery errors
SMTP & DNS
SPF troubleshooting
Run a free Email Security Score
Get a complete report covering authentication, reputation, transport security, and brand trust.
Run Email Security Score