PyPI
twisted/twisted
Event-driven networking engine written in Python.
Custom licenseAug 27, 2026 · metrics 2.10.0
All tags
Catalogue tag
#smtp
Every repository in the public record carrying this tag — from its GitHub topics or the keywords its package registries publish. Health is measured under the same versioned methodology as the rest of the record.
108 records
npm
haraka/Haraka
A fast, highly extensible, and event driven SMTP server
MITAug 28, 2026 · metrics 2.10.0
PyPI · crates.io
chatmail/core
Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧
Custom licenseSep 17, 2026 · metrics 2.10.0
npm · Packagist
nextcloud/mail
💌 Mail app for Nextcloud
AGPL-3.0Sep 10, 2026 · metrics 2.10.0
NuGet · Maven · npm
apache/logging-log4net
Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET
Apache-2.0Oct 20, 2026 · metrics 2.10.0
Maven
greenmail-mail-test/greenmail
Official master for the Greenmail project
Apache-2.0Oct 20, 2026 · metrics 2.10.0
crates.io
lettre/lettre
a mailer library for Rust
MITSep 16, 2026 · metrics 2.10.0
PyPI · npm
Wh1isper/mcp-email-server
Full-featured, multi-account MCP email server for Windows, macOS, and Linux—read, search, organize, and send email via IMAP and SMTP.
BSD-3-ClauseSep 15, 2026 · metrics 2.10.0
Packagist
cypht-org/cypht
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
LGPL-2.1Sep 10, 2026 · metrics 2.10.0
Go
projectdiscovery/interactsh
An OOB interaction gathering server and client library
MITSep 20, 2026 · metrics 2.10.0
crates.io
stalwartlabs/stalwart
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
Custom licenseAug 27, 2026 · metrics 2.10.0
npm · Go
tokencanopy/e2a
Open-source email API for applications and AI agents. Managed hosting at e2a.dev, or self-host with Docker.
Apache-2.0Sep 11, 2026 · metrics 2.10.0
Packagist
PHPMailer/PHPMailer
The classic email sending library for PHP
LGPL-2.1Sep 16, 2026 · metrics 2.10.0
npm
forwardemail/forwardemail.net
Privacy-focused encrypted email for everyone. All-in-one alternative to Gmail + Mailchimp + Sendgrid.
Custom licenseSep 6, 2026 · metrics 2.10.0
npm
n24q02m/better-email-mcp
IMAP/SMTP email for AI agents -- read, send, organize folders, and manage attachments across multiple accounts, with auto-discovery.
Apache-2.0Sep 9, 2026 · metrics 2.10.0
crates.io
c410-f3r/wtx
Written by humans. WTX is a collection of different transport implementations and related tools focused primarily on web technologies.
MPL-2.0Sep 15, 2026 · metrics 2.10.0
NuGet
jstedfast/MailKit
A cross-platform .NET library for IMAP, POP3, and SMTP.
MITOct 20, 2026 · metrics 2.10.0
npm · Go
marle3003/mokapi
Your API mocking tool for OpenAPI and AsyncAPI using Go and JavaScript - https://mokapi.io
MITSep 6, 2026 · metrics 2.10.0
npm
veliovgroup/mail-time
📮 Email queue extending NodeMailer with multi SMTP transports and horizontally scaled applications support
BSD-3-ClauseSep 18, 2026 · metrics 2.10.0
NuGet
VirtoCommerce/vc-module-notification
Managing and delivering notifications within the Virto Commerce platform
Custom licenseSep 15, 2026 · metrics 2.10.0
Go · npm
a-novel-kit/golib
Shared Go libraries.
MITSep 17, 2026 · metrics 2.10.0
PyPI
cole/aiosmtplib
asyncio smtplib implementation
MITAug 27, 2026 · metrics 2.10.0
npm
dahlia/upyo
Upyo is a simple and cross-runtime library for sending email messages using SMTP and various email providers. It works on Node.js, Deno, Bun, and edge functions.
MITSep 12, 2026 · metrics 2.10.0
Packagist
nette/mail
A handy library for creating and sending emails in PHP
Custom licenseOct 20, 2026 · metrics 2.10.0
RubyGems
sisimai/rb-sisimai
Mail Analyzing Interface for email bounce: A Ruby library to parse RFC5322 bounce mails and generating structured data as JSON from parsed results. Ruby version of Sisimai: an error mail analyzer.
Custom licenseSep 10, 2026 · metrics 2.10.0
PyPI
pallets-eco/flask-mail
Flask-Mail adds SMTP mail sending to your Flask applications
BSD-3-ClauseSep 10, 2026 · metrics 2.10.0
NuGet
soenneker/soenneker.email.mime
A resilient, configurable SMTP email sender
MITSep 10, 2026 · metrics 2.10.0
NuGet
soenneker/soenneker.email.sender
A high-level utility responsible for orchestrating the creation and delivery of templated email messages
MITSep 9, 2026 · metrics 2.10.0
NuGet
soenneker/soenneker.email.util
A utility to place emails on Service Bus
MITSep 9, 2026 · metrics 2.10.0
NuGet
soenneker/soenneker.resend.client
A .NET thread-safe singleton HttpClient for Resend
MITSep 9, 2026 · metrics 2.10.0