Does this skill support testing for open mail relays?

Absolutely. It provides both manual (Telnet/Netcat) and automated (Nmap/Metasploit) methods to verify if a server allows unauthorized external relaying.

Is this skill intended for malicious use?

No, this skill is strictly for authorized security assessments and requires written permission from the server owner before any testing begins.

Can this skill help detect email spoofing vulnerabilities?

Yes, it includes phases for analyzing SPF, DKIM, and DMARC DNS records to ensure proper email authentication and prevent sender spoofing.

What tools are required for this SMTP penetration testing skill?

This skill utilizes common security tools including Nmap, Netcat, Hydra, smtp-user-enum, and the Metasploit Framework to perform various stages of assessment.

SMTP Security Penetration Testing

Name: SMTP Security Penetration Testing
Author: claudiodearaujo

byclaudiodearaujo

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Security & Testing

Conducts thorough security assessments of SMTP servers to identify vulnerabilities like open relays, user enumeration, and weak authentication.

This skill provides a comprehensive framework for auditing the security of Simple Mail Transfer Protocol (SMTP) servers. It guides users through the entire penetration testing lifecycle—from initial service discovery and banner grabbing to advanced techniques like open relay testing, user enumeration (via VRFY/EXPN/RCPT), and brute-force credential attacks. By providing specific tool commands and manual testing sequences, it helps security professionals and developers identify misconfigurations, enforce TLS encryption, and validate email authentication records like SPF, DKIM, and DMARC to prevent spoofing and unauthorized access.

Key Features

01Automated service discovery and banner grabbing using Nmap and Netcat

021 GitHub stars

03Comprehensive open relay testing to prevent unauthorized email routing

04Configuration auditing for TLS/SSL encryption and DNS-based email authentication

05Credential security assessment through brute-force testing with Hydra and Metasploit

06Advanced user enumeration techniques including VRFY, EXPN, and RCPT TO methods

Use Cases

01Verifying the effectiveness of email security hardening measures and authentication protocols

02Auditing enterprise mail servers for misconfigurations that could lead to data leaks or spam relaying

03Performing authorized security assessments during a broader network penetration test

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add claudiodearaujo/sistema-de-narra-o-de-livro smtp-penetration-testing

For use in Claude.ai and ChatGPT

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