docker-mailserver vs GlassWire

docker-mailserver provides a complete, production‑ready mail server stack packaged as a single Docker image. It bundles Postfix, Dovecot, SpamAssassin, ClamAV and other components, making deployment and management simple for developers and sysadmins. The solution runs on any Linux host with Docker, offering self‑hosted email with TLS, DKIM, SPF and easy user management via environment variables or mounted configuration files.

GlassWire is a network monitoring and personal firewall application for Windows and Android that visualizes current and past network activity to help users spot malware, bandwidth hogs, and unfamiliar devices on their network. Its firewall includes an ask-to-connect mode that lets users approve or deny individual apps' network access, alongside a network time machine for reviewing historical connections. GlassWire also tracks data usage across devices and can alert users before they exceed set data limits, while its network scanner flags new or unknown devices joining a WiFi network. Over 53 million downloads have been recorded for the Windows and Android apps combined.

• Free and open‑source
• Easy to deploy with Docker
• Comprehensive feature set out of the box
• Active community support

• Combines network monitoring and firewall in one lightweight app
• Very affordable premium pricing at $2.99/month
• Visual, easy-to-understand traffic graphs
• Available on both Windows and Android

• Requires Linux host with Docker installed
• Advanced configuration can be complex
• Limited official GUI for administration

• Free tier limits network history to just 24 hours
• Windows and Android only, no Mac or Linux support
• Advanced threat detection features require Premium