pop3 — open-source software health

Maven

91Excellenthealth index

greenmail-mail-test/greenmail

Official master for the Greenmail project

Java★ 747Oct 20, 2026

Apache-2.0Oct 20, 2026 · metrics 2.10.0

Packagist

88Excellenthealth index

cypht-org/cypht

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

PHP · JavaScript★ 1,725Sep 10, 2026

LGPL-2.1Sep 10, 2026 · metrics 2.10.0

crates.io

88Excellenthealth index

stalwartlabs/stalwart

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

Rust★ 14.4KAug 27, 2026

Custom licenseAug 27, 2026 · metrics 2.10.0

NuGet

86Excellenthealth index

jstedfast/MailKit

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

C#★ 6,863Oct 20, 2026

MITOct 20, 2026 · metrics 2.10.0

npm

77Goodhealth index

forwardemail/caldav-adapter

CalDAV server for Node.js and Koa. Modernized and maintained for @forwardemail

JavaScript★ 35↓ 1,629/moSep 16, 2026

MITSep 16, 2026 · metrics 2.10.0

npm

75Goodhealth index

happyvertical/sdk

No repository description published.

TypeScript★ 1↓ 66.4K/moOct 20, 2026

MITOct 20, 2026 · metrics 2.10.0

npm

71Goodhealth index

gmitch215/edgeport

🛜 TCP Library for Cloudflare Workers

TypeScript★ 8↓ 2,570/moSep 24, 2026

MITSep 24, 2026 · metrics 2.10.0

65Goodhealth index

markushinz/aws-ses-pop3-server

The missing POP3 💌 server for Amazon Simple Email Service - written in golang.

Go★ 43Sep 10, 2026

Apache-2.0Sep 10, 2026 · metrics 2.10.0

PyPI

62Moderatehealth index

c0r0n3r/cryptolyzer

CryptoLyzer is a fast, flexible and comprehensive server cryptographic protocol (TLS, SSL, SSH, DNSSEC) and related setting (HTTP headers, DNS records) analyzer and fingerprint (JA3, HASSH tag) generator with Python API and CLI. (read-only clone of the original GitLab project)

Python★ 48Sep 14, 2026

MPL-2.0Sep 14, 2026 · metrics 2.10.0

npm

56Moderatehealth index