Email Server Tester

Email Server Configuration and Authentication Testing

The most comprehensive tool of its kind

The Email Server Testing Platform analyzes your email headers to ensure your mail server is setup and configured correctly.

This tool offers an incredibly detailed look into your mail server settings. We use header information from your email to run more than 100 mail tests against your mail server configuration. If we find references to additional mail servers in your headers, configuration or DNS records, we'll test those, too.

The Email Server Tester is part of our new subscription-based Deliverability Toolkit. These tools offer actionable insights and data, all with the goal of making sure that your emails reach their recipients.

Identify potential mail server setting issues quick and easily and follow best practices when sending your campaigns.

If your mail server is not configured correctly:
  • Gmail, Hotmail, Yahoo, AOL, etc might be sending it to spam
  • It's likely some of your customers don't even receive your emails
  • Highly possible you will be listed on different blacklists
  • You will be losing sales and customers
  • Customers will get angry from not getting information from you
  • Your IT costs will increase to clean your IP's and reputation

What We Test For

Header Information

  • Return Path
  • DKIM Signature
  • DomainKey Signature
  • Message ID
  • X-AntiAbuse
  • and more

RFC Based Testing

  • RFC 2045 (MIME)
  • RFC 4406 (Sender ID)
  • RFC 4408 (SPF)
  • RFC 4871 (DKIM)
  • RFC 5322 (Message Format)
  • and more

DNS Records Checks

  • MX Records
  • rDNS PTR Records
  • SPF Records
  • Last Sending Domain
  • A Records
  • and more

Email Port Checks

  • Connection Status
  • Supported Extensions
  • SMTP Banner rDNS
  • SSL Protocol
  • SSL Cipher
  • and more

DMARC Analysis

  • RUA Check
  • RUF Check
  • ADKIM Test
  • DKIM Test
  • and more

Other Tests

  • SPF Alignment
  • DKIM Alignment
  • DMARC Check
  • Author Domain Signing Policy (ADSP)
  • DomainKeys Check
  • and more

Try it for Free with Your Freemium Account!