In hMailServer Admin > Settings > Advanced > IP Ranges, ensure "External to External" requires authentication.
While "hMailServer hacktricks" is not an official tool or script collection, it represents a mindset: the collection of techniques, misconfigurations, and edge cases that attackers exploit. In this article, we’ll explore the most common hMailServer vulnerabilities, configuration weaknesses, and post-exploitation tricks – all from an educational and defensive standpoint.
Table_title: New CVE Received from MITRE 7/21/2025 12:15:30 PM Table_content: header: | Action | Type | New Value | row: | Action: National Institute of Standards and Technology (.gov) hmailserver hacktricks
Use Windows Authentication for database connections instead of hardcoded credentials in Least Privilege:
Assuming you're looking for potential vulnerabilities or tricks related to HMailServer, here are a few: In hMailServer Admin > Settings > Advanced >
For pentesters, add hMailServer to your checklist during internal engagements – it’s often the overlooked key to domain persistence.
Defenders should treat hMailServer like any critical infrastructure: restrict access, encrypt everything, audit scripts, and monitor logs religiously. Table_title: New CVE Received from MITRE 7/21/2025 12:15:30
HMailServer, by default, allows unauthenticated SMTP relaying, which can be exploited to send spam emails. An attacker can use tools like telnet or swaks to test if the mail server is vulnerable.
"SENT: 220 mail.target.com" "RECEIVED: AUTH LOGIN" "RECEIVED: dXNlcm5hbWU=" "RECEIVED: cGFzc3dvcmQxMjM="
Stay secure, think like an attacker, but act like a guardian.