Free tools

Email marketing tools to help you check configuration, diagnose problems and optimize campaigns.

All-in-one domain check →

Check MX, SPF, DMARC, optional DKIM and transport security DNS records in one report.

Check domain authentication and email delivery configuration

Check MX, SPF, DMARC, optional DKIM and transport security DNS records in one report.

Find out which mail servers serve your domain and whether MX records are configured correctly.

Check SPF record configuration and find out if your domain is properly protected.

Make sure DKIM signature configuration works correctly and emails are authenticated.

Analyze DMARC policy and get recommendations on how to improve domain protection.

Determine whether your domain or IP address is listed on spam blacklists.

Analyze email headers and diagnose delivery problems.

Optimize your email campaigns and improve results

Evaluate your subject line and get recommendations on how to improve it.

Calculate your campaign open rate and compare with industry averages.

Calculate click-through rate (CTR) and evaluate campaign effectiveness.

Determine how many subscribers you need for a reliable A/B test.

Find out if your text contains words that could trigger spam filters.

Check and validate email addresses and domains

Check email address format and validity according to RFC standards.

Validate multiple email addresses at once and get CSV results.

Find out how old a domain is and when it was registered.

Our team can help solve the most complex deliverability challenges