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Tech riderRev. 22 Sept 2026

Mailoney

Ch 156.5of 18 Honeypot Software
  1. 1Runs onLinux, self-hosted, Windows
  2. 2CostsNot stated by the maker
  3. 3Deployment modelself-hosted
  4. 4Decoy scopeapplication
  5. 5Credential luresYes
4 lines stated Written from the maker's own pages: github.com
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The Mailoney homepage

Overview

Mailoney is ranked #15 of 18 in honeypot software on Specifiction. It runs on Linux, Self-hosted, Windows.

Compared on honeypot software

Deployment model
self-hostedgithub.com
Decoy scope
applicationgithub.com
Credential lures
Yesgithub.com

Facts

Purpose
Mailoney is a low-interaction SMTP honeypot that simulates a vulnerable mail server to detect and log unauthorized access attempts, credential harvesting, and other SMTP attacks.github.com · 4 Oct 2026
SMTP capture
It accepts SMTP connections on port 25 and captures authentication attempts and credentials.github.com · 4 Oct 2026
Database
Session data can be stored in SQLite, PostgreSQL, or MySQL/MariaDB; PostgreSQL is recommended for production.github.com · 4 Oct 2026
Deployment
The project provides a Docker image and Docker Compose instructions, as well as local installation instructions using Python.github.com · 4 Oct 2026
Log integrations
JSON Lines event output can be used with log shippers, and the README describes shipping logs to SIEM, ELK Stack, or Loki.github.com · 4 Oct 2026
Prometheus
An optional Prometheus metrics endpoint reports connection, session, credential, command, and duration metrics.github.com · 4 Oct 2026
Message retention
Captured email bodies are discarded by default; setting MAILONEY_MAIL_DIR opts in to writing them to disk.github.com · 4 Oct 2026
TLS
The SMTP server supports STARTTLS when both a certificate and private key are configured, with a TLS 1.2 minimum.github.com · 4 Oct 2026
Security guidance
The README advises deploying Mailoney in a controlled environment, using limited privileges, and configuring a firewall.github.com · 4 Oct 2026
Metrics exposure
The README warns that the unauthenticated metrics endpoint can identify the software as a honeypot and recommends keeping it off the internet.github.com · 4 Oct 2026
License
Mailoney is distributed under the MIT License, which grants permission to use, copy, modify, and distribute the software free of charge.github.com · 4 Oct 2026
API
The README suggests extending Mailoney to provide a REST API; it does not describe a built-in API.github.com · 4 Oct 2026

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Where it ranks on Specifiction

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Sources