Pop3 GitHub Repositories (2026) · Open Source Tools

Self-hosted mail server for your own domain: SMTP/IMAP/POP3, CardDAV/CalDAV, React webmail and admin console, one-command Docker Compose.

A cross-platform .NET library for IMAP, POP3, and SMTP.

Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.

DavMail POP/IMAP/SMTP/CalDAV/CardDAV/LDAP Exchange and Office 365 Gateway - Synced with main subversion repository at

Official master for the Greenmail project

Eventum Issue Tracking System

Local-first mail development environment. Point your app at localhost and inspect every message, protocol trace and delivery outcome. SMTP, IMAP, POP3 and a REST API in one self-contained binary.

An open-source, clean-room, local-first alternative to Microsoft Outlook in pure Rust

Mailozaurr is a PowerShell module that aims to provide SMTP, POP3, IMAP and probably some other ways to interact with Email. Underneath it uses MimeKit and MailKit libraries written by Jeffrey Stedfast.

VMime Mail Library

Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)