# mailspoof mailspoof is an Email Security Platforms product. It runs on-premises. Pricing is free. A command-line tool that analyzes SPF and DMARC records to identify domains vulnerable to email spoofing attacks. Checked October 2026. ## What is mailspoof? mailspoof is a command-line tool designed to assess email spoofing vulnerabilities by analyzing SPF and DMARC records of target domains. The tool enables security professionals to identify domains with lax email authentication policies that could be exploited for email spoofing attacks. It accepts domain inputs through command-line arguments or file lists and outputs results in JSON format for easy parsing and analysis. mailspoof can process multiple domains simultaneously, making it suitable for bulk assessment of organizational domains or external domains that employees might trust, such as suppliers or business partners identified through OSINT activities. The tool is particularly useful for penetration testers and red team operations to identify potential attack vectors through email spoofing. It helps organizations understand their email security posture by revealing weaknesses in their SPF and DMARC configurations that could allow attackers to send emails appearing to originate from their domains. Installation is straightforward through pip3, and the JSON output format allows for integration with other security tools and automated workflows for further analysis and reporting. Tags: Red Team, OSINT, Spoofing, DMARC, SPF ## Where it fits in your security program (NIST CSF 2.0) - [Identify](https://cybersectools.com/guides/building-identify-program-small-team): helps you know your assets and your risks. ## Quick facts - Category: [Email & Messaging Security](https://cybersectools.com/categories/email-security) ยท [Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) - Deployment: On-Premises - Company size fit: Startup, SMB, Mid-Market, Enterprise - Pricing model: Free - GitHub stars: 131 - Website: github.com ## Where it ranks mailspoof is not a pick on the current [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms). ## mailspoof FAQ ### What is mailspoof? mailspoof is a product in the Email Security Platforms category. It covers Red Team, OSINT and Spoofing. ### What is the pricing for mailspoof? mailspoof is free. Download and setup instructions are at https://github.com/serain/mailspoof/. ### What are alternatives to mailspoof? Alternatives to mailspoof listed on CybersecTools: 1. [Fortra Email Security & Anti-Phishing](https://cybersectools.com/tools/fortra-email-security-and-anti-phishing) - Email security platform protecting against phishing, BEC, and data loss (Commercial) 2. [Mimecast DMARC Analyzer](https://cybersectools.com/tools/mimecast-dmarc-analyzer) - DMARC implementation & monitoring tool to prevent domain spoofing attacks (Commercial) 3. [Ironscales DMARC Management](https://cybersectools.com/tools/ironscales-dmarc-management) - DMARC management platform for email authentication and domain protection (Commercial) 4. [Sendmarc DMARC Managed Services](https://cybersectools.com/tools/sendmarc-dmarc-managed-services) - MSP-focused multi-tenant DMARC management platform for email auth at scale. (Commercial) 5. [EasyDMARC Email Auth for Gmail, Yahoo & Microsoft](https://cybersectools.com/tools/easydmarc-email-auth-for-gmail-yahoo-and-microsoft) - Domain scanner & compliance tool for Gmail, Yahoo & Microsoft DMARC requirements. (Commercial) Compare all mailspoof alternatives at [https://cybersectools.com/alternatives/mailspoof](https://cybersectools.com/alternatives/mailspoof) ### What deployment and organization size does mailspoof fit? mailspoof is available as on-premises software. It is listed for startups, small businesses, mid-market companies and enterprises. It is free. ## Compare mailspoof with similar solutions - [mailspoof vs Fortra Email Security & Anti-Phishing](https://cybersectools.com/compare/fortra-email-security-and-anti-phishing-vs-mailspoof) - [mailspoof vs Mimecast DMARC Analyzer](https://cybersectools.com/compare/mailspoof-vs-mimecast-dmarc-analyzer) - [mailspoof vs Ironscales DMARC Management](https://cybersectools.com/compare/ironscales-dmarc-management-vs-mailspoof) All alternatives to mailspoof: [/alternatives/mailspoof](https://cybersectools.com/alternatives/mailspoof) --- Source: https://cybersectools.com/tools/mailspoof For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any compare page has a Markdown copy too (add .md to its URL). More on mailspoof: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=product-md