Email Security Learning Resources

Explore comprehensive learning resources on email security protocols like DMARC, SPF, and DKIM. From free online courses at DMARC Academy and EasyDMARC to best practice guides and technical RFC documents, deepen your understanding of email authentication and protection with expert-led content and testing tools.

  • DMARC Academy
     A free online educational platform that helps professionals and aspiring individuals to learn about DMARC and its supportive technologies of SPF and DKIM.
  • EasyDMARC Academy
    EasyDMARC’s “DMARC: Basics to Advanced” and “DMARC Expert” free courses are designed to help you understand the detailed instruction and implementation of DMARC and email protection. Pass all quizzes and get your certifications and LinkedIn badges to share with your professional network.
  •  Email Authentication Recommended Best Practices
    This document recommends a set of best practices for authenticating email messages using the security protocols SPF, DKIM and DMARC.
  • PowerDMARC The Email Authentication Fundamentals course
    The Email Authentication Fundamentals course is a  guide to email authentication protocols like DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT.
  • Learn DMARC
    A testing tool that also educates. It’s free, no signup. Learn and test SPF, DKIM and DMARC with LearnDMARC.
  • Jengri AI
    An AI-powered English polishing and learning platform that helps professionals improve communication. Refine your email copy, correct grammar, and enhance clarity to improve deliverability and audience engagement.
  • Email Investigation

    The EasyDMARC Email Investigation Tool helps analyze and diagnose email authentication issues, ensuring proper implementation of DMARC, SPF, and DKIM to enhance email security.

  • Mail Tester
    Mail-Tester helps you check your email’s authentication setup by analyzing SPF, DKIM, and DMARC records. It provides a score based on your email’s security and deliverability, offering insights for improvement.
  • SMTP Diagnostics Tool

    The MXToolbox SMTP Diagnostics Tool allows you to test and troubleshoot email delivery issues, including SMTP, DNS, and email authentication checks for SPF, DKIM, and DMARC. It helps identify and resolve email server problems to improve deliverability and security.

  • Email deliverability test
    Warmy.io’s Email Deliverability Test is a free tool that analyzes email performance by checking for issues like spam triggers, blacklists, and improper SPF, DKIM, or DMARC setups. It provides a deliverability score and actionable insights to improve inbox placement, making it useful for marketers and email admins.

  • About My Email 
    About My Email (aboutmy.email)     is a tool designed to analyze email deliverability, validate authentication protocols (SPF, DKIM, DMARC), and detect potential issues like spam risks or blacklistings. It helps users optimize their email setups for better inbox placement.

  • Microsoft Message Header Analyzer (MHA)
    Message Header Analyzer by Microsoft. It helps decode and analyze email headers to troubleshoot delivery issues, understand delays, and trace the email’s path through mail servers.

  • Google Admin Toolbox Dig

    The Google Admin Toolbox Dig tool allows users to perform DNS lookups to troubleshoot domain and email configurations. It helps verify records like A, MX, SPF, DKIM, and others for resolving DNS-related issues.

  • ProtoDave DKIM Key Checker

    The ProtoDave DKIM Key Checker verifies the validity of a DKIM public key in DNS and checks its length. It ensures the key meets recommended security standards, typically 1024-bit or 2048-bit, and alerts if it’s too short, which could compromise security.

  • IsNotSpam

    IsNotSpam is a tool that helps you test your email content to ensure it doesn’t trigger spam filters. By sending your email to the service, it checks for issues like SPF, DKIM, and SpamAssassin flags. The tool provides a report, highlighting potential problems that could cause your email to land in the spam folder, helping you improve delivery and avoid common mistakes.

  • Autoklose

    Autoklose’s Email Spam Checker is an online tool that helps you identify spam trigger words in your email content. Simply paste your email into the checker, and it scans the text for common phrases that could flag it as spam. The tool then provides a list of potential issues along with suggestions for improvement, helping you optimize your emails for better deliverability and ensuring they reach your intended recipients.

  • Guard.io
    Guard.io’s Subdomailing is a tool designed to identify potential phishing or malicious activity by analyzing suspicious subdomains. It helps users detect threats, avoid scams, and enhance cybersecurity awareness.

  • GMass SMTP Test
    The GMass SMTP Test is a free online tool that allows you to test the connectivity and functionality of your SMTP server. It verifies server credentials, checks for errors, and ensures your email server is configured correctly for sending messages. This tool is particularly useful for diagnosing email delivery issues and ensuring smooth SMTP operation.

  • Hunter.io
    Hunter’s Email Verifier does a complete check of email addresses, verifies if it appears publicly on the web and returns the sources.
  • Toolkit by Zoho Mail
    The Zoho Mail Toolkit provides DNS checks, email header analysis, and tools to diagnose and optimize domain email configurations.
  • SMTP Field Manual
    The SMTP Field Manual is a comprehensive guide for understanding and troubleshooting SMTP, with tips on email delivery, server configuration, and diagnostics.
  • Spamhaus Domain Reputation Checker
    The Spamhaus Domain Reputation Checker evaluates the reputation of a domain, identifying issues affecting email deliverability and trustworthiness.