How to Scan and Hack SMTP Servers for Beginners | Ep. 33

Welcome back to 1Trust Security! 🚀 In this episode, we’re exploring SMTP (Simple Mail Transfer Protocol), the protocol responsible for sending email messages. We’ll use Kali Linux to enumerate an SMTP service in a controlled penetration-testing lab and examine potential security weaknesses. 🔍 WHAT YOU’LL LEARN: What SMTP is and how it works Common SMTP ports: 25, 465, and 587 How to identify SMTP services using Nmap SMTP enumeration techniques How to assess SMTP security misconfigurations Security recommendations for protecting mail servers 🛠️ TOOLS: Kali Linux, Nmap, Metasploit Framework 🧪 LAB: Metasploitable 2 ⚠️ DISCLAIMER: This video is for educational purposes and authorized security testing only. Never test systems without explicit permission. Subscribe to 1Trust Security for more practical cybersecurity tutorials, ethical hacking, and penetration-testing lessons! Basic network scan to discover open ports nmap 192.168.0.15 Service and version scan specifically targeting SMTP Port 25 nmap -sV -p 25 192.168.0.15 Aggressive Nmap Scripting Engine (NSE) scan utilizing all SMTP scripts nmap p 25 --script=smtp* 192.168.0.15 Launch the Metasploit Framework console msfconsole Select the SMTP User Enumeration auxiliary module use auxiliary/scanner/smtp/smtp_enum Set the remote host target IP address set rhosts 192.168.0.15 Point the module to your custom text file list of usernames set USER_FILE usernames Execute the scanner module to find valid system accounts exploit 00:00 - Introduction to SMTP & Pentesting Lab (0:06) 00:27 - Initial Nmap Scan & SMTP Definition (0:27) 00:56 - Nmap Service & Version Scan (Port 25) (0:56) 01:27 - Checking for Vulnerabilities (Postfix) (1:27) 01:57 - Nmap Script Scanning for SMTP (1:57) 04:12 - Setting up Metasploit (MSFconsole) (4:12) 05:01 - Configuring the SMTP Auxiliary Scanner (4:58) 05:46 - Explaining User Enumeration & Custom Wordlists (5:46) 07:00 - Running the Exploit & Harvesting Valid Usernames (7:00) 07:49 - Conclusion & Next Pentesting Steps (7:49) #CyberSecurity #SMTP #KaliLinux #EthicalHacking #Metasploit #CyberSecurity #TechTips #OnlineSafety #InfoSec #Shorts