EmailRelay

OPEN SRC

A small and easy to configure SMTP and POP3 server for Windows and Linux.

► Small teams needing a lightweight mail relay

VG SCORE

6.5

VIEW ALTERNATIVES

Product Details

PricingOpen Source

Learning CurveModerate

Integrations7 available

■ INTELLIGENCE BRIEFING — Weekly tool drops. No spam.

PROS & CONS

STRENGTHS

Extremely lightweight and resource-efficient.
Very lightweight with minimal resource usage.
Completely free and open-source software.

WEAKNESSES

−Lacks a graphical user interface (GUI), requiring command-line configuration.
−Its configuration uses a custom syntax, which can be less intuitive than standard formats like YAML or JSON for new users.

KEY FEATURES

Simple Configuration

Uses straightforward configuration files and command-line options.

Mail Forwarding/Relaying

Forwards emails to another SMTP server, useful for filtering or logging.

Mail Caching & Forwarding

Stores messages locally and can relay them to another SMTP server.

Cross-Platform

Runs natively on Windows and Linux operating systems.

WHO IS EmailRelay BEST FOR?

System administrators and developers

Best for those needing a lightweight, local mail server to test email functionality in applications without using a public SMTP service.

INTEGRATIONS

Web applicationsSMTP clientsLog analysis toolsMonitoring toolsScripting languages (e.g., Python, PHP)Email clients (e.g., Outlook, Thunderbird)POP3 clients