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EmailRelay

OPEN SRC

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

VG SCORE
8.5
VIEW ALTERNATIVES

Product Details

PricingOpen Source
Learning CurveModerate
Integrations7 available

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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.

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

TECHNICAL DETAILS

LEARNING CURVE
MODERATE — FEW HOURS

FIELD REPORTS (0)

No field reports yet. Be the first to review EmailRelay.

DOSSIER

LAST VERIFIED MAR 23, 2026
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FILED UNDER

Developer ToolsOpen Source

ALTERNATIVES

Dovel9.0/10Haraka9.0/10
ALL ALTERNATIVES

INTEGRATIONS

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

PRICING MODEL

open source

BEST FOR

System administrators and developers

FINAL ASSESSMENT

APPROVED — WORTH YOUR MONEY

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