Generating secure email address...
Everything about Mail Tester
Detailed insights and instructions for using the diagnostic utility effectively.
What is the Mail Tester tool?
The NetScanner Mail Tester tool is a free, browser-based diagnostic utility designed for developers and IT professionals. It allows you to securely inspect configurations, verify deployments, and troubleshoot issues in real-time. Unlike older tools, this check runs instantly and fetches live data.
How to use it
Simply enter your target domain name, IP address, or input string into the scanner above and hit Run Analysis. The tool will automatically parse your input, execute the necessary network requests from our secure proxy, and return the formatted results.
Understanding the Results
Our Mail Tester tool not only provides raw data but also highlights expert recommendations. Look for yellow warning banners—these indicate potential security vulnerabilities or misconfigurations that you should address.
Limitations
Results are cached for a few seconds to prevent abuse. If you recently updated your DNS records or server configuration, please allow time for global DNS propagation before running the check again.
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Tool Details & Usage
Information on inputs, outputs, and limitations.
Email Diagnostic & Mail Tester Guide
Testing email deliverability is crucial for marketing and transactional mail. This tool provides a temporary inbox, allowing you to send an email and analyze how it is received.
Supported Inputs
- Send an actual email from your mail client or server to the unique, temporary email address provided on the screen.
How to Interpret the Output
- Received Headers: View the raw email headers to see the routing path.
- Authentication: Checks for the presence and basic alignment of SPF, DKIM, and DMARC in the received headers.
- Diagnostic Score: A custom score based on the presence of proper authentication and clean formatting.
Realistic Example
You send an email from your server to the test address. The results show a score of 10/10 because your server properly signed the email with DKIM and the return path matched your SPF record.
Common Errors & Limitations
- Custom Diagnostics, Not SpamAssassin: This tool relies on a custom checklist of best practices; it does not run the SpamAssassin engine.
- No SMTP Probing: This tool analyzes mail received by it. It does not probe your server’s SMTP configuration or verify if external email addresses exist.
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