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#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.

42 records
Tagged “smtp”Ranked by health index
PyPI
87Excellenthealth index
twisted/twisted
Event-driven networking engine written in Python.
Python★ 5,973↓ 14.7M/moJul 18, 2026
Custom licenseJul 18, 2026 · metrics 1.13.0
npm · Packagist
81Goodhealth index
nextcloud/mail
💌 Mail app for Nextcloud
JavaScript · PHP · Vue★ 1,005Jul 17, 2026
AGPL-3.0Jul 17, 2026 · metrics 1.13.0
crates.io
75Goodhealth index
stalwartlabs/mail-server
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
Rust★ 13.7KJul 16, 2026
No licenseJul 16, 2026 · metrics 1.13.0
crates.io
75Goodhealth index
stalwartlabs/stalwart
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
Rust★ 13.6K↓ 2/moJul 14, 2026
No licenseJul 14, 2026 · metrics 1.13.0
Packagist
74Goodhealth index
cypht-org/cypht
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
PHP · JavaScript★ 1,627↓ 0/moJul 14, 2026
LGPL-2.1Jul 14, 2026 · metrics 1.13.0
Packagist
74Goodhealth index
jasonmunro/cypht
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
PHP · JavaScript★ 1,633Jul 17, 2026
LGPL-2.1Jul 17, 2026 · metrics 1.13.0
Packagist
74Goodhealth index
jasonmunro/hm3
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
PHP · JavaScript★ 1,633Jul 17, 2026
LGPL-2.1Jul 17, 2026 · metrics 1.13.0
npm
71Goodhealth index
forwardemail/forwardemail.net
Privacy-focused encrypted email for everyone. All-in-one alternative to Gmail + Mailchimp + Sendgrid.
JavaScript · Pug★ 1,624Jul 15, 2026
Custom licenseJul 15, 2026 · metrics 1.13.0
npm
71Goodhealth index
n24q02m/better-email-mcp
IMAP/SMTP email for AI agents -- read, send, organize folders, and manage attachments across multiple accounts, with auto-discovery.
TypeScript★ 26↓ 4,113/moJul 16, 2026
MITJul 16, 2026 · metrics 1.13.0
PyPI
69Moderatehealth index
pallets-eco/flask-mail
Flask-Mail adds SMTP mail sending to your Flask applications
Python★ 641↓ 1.6M/moJul 18, 2026
BSD-3-ClauseJul 18, 2026 · metrics 1.13.0
RubyGems
69Moderatehealth index
postalserver/postal
📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail
Ruby · Haml★ 16.7KJul 20, 2026
MITJul 20, 2026 · metrics 1.13.0
RubyGems
69Moderatehealth index
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.
Ruby★ 90Jul 17, 2026
Custom licenseJul 17, 2026 · metrics 1.13.0
PyPI
68Moderatehealth index
cole/aiosmtplib
asyncio smtplib implementation
Python★ 429↓ 19M/moJul 21, 2026
MITJul 21, 2026 · metrics 1.13.0
PyPI
68Moderatehealth index
pytest-dev/pytest-localserver
pytest plugin to test server connections locally. This repository was migrated from Bitbucket.
Python★ 37↓ 466.1K/moJul 21, 2026
MITJul 21, 2026 · metrics 1.13.0
—
68Moderatehealth index
soenneker/soenneker.email.mime
A resilient, configurable SMTP email sender
C#★ 0Jul 17, 2026
MITJul 17, 2026 · metrics 1.13.0
—
68Moderatehealth index
soenneker/soenneker.email.sender
A high-level utility responsible for orchestrating the creation and delivery of templated email messages
C#★ 0Jul 17, 2026
MITJul 17, 2026 · metrics 1.13.0
Go · npm
67Moderatehealth index
marle3003/mokapi
Your API mocking tool for OpenAPI and AsyncAPI using Go and JavaScript - https://mokapi.io
Go · Vue★ 56Jul 15, 2026
MITJul 15, 2026 · metrics 1.13.0
Go · npm
67Moderatehealth index
tokencanopy/e2a
Authenticated email gateway for AI agents — SPF/DKIM verified inbound, HMAC-signed delivery, webhook + WebSocket fan-out, CLI + SDKs
Go · TypeScript · Python★ 175Jul 19, 2026
Apache-2.0Jul 19, 2026 · metrics 1.13.0
npm
66Moderatehealth index
nikolausm/imap-mcp-server
A powerful Model Context Protocol (MCP) server for IMAP email integration with Claude
TypeScript★ 60↓ 2,797/moJul 21, 2026
MITJul 21, 2026 · metrics 1.13.0
Go
65Moderatehealth index
sisimai/go-sisimai
Sisimai is a library provided as a Go package that decodes various formats of bounce emails and outputs structured data necessary for analysis, such as destination addresses and bounce reasons.
Go★ 42Jul 21, 2026
BSD-2-ClauseJul 21, 2026 · metrics 1.13.0
Go · npm
64Moderatehealth index
dever-labs/mockly
Cross-platform multi-protocol mock server — HTTP, WebSocket, gRPC, GraphQL, TCP, Redis, SMTP, MQTT — with a web UI, scenario system, and fault injection.
Go · Java★ 1Jul 17, 2026
MITJul 17, 2026 · metrics 1.13.0
npm
63Moderatehealth index
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.
TypeScript★ 555Jul 20, 2026
MITJul 20, 2026 · metrics 1.13.0
Go
62Moderatehealth index
higgscli/higgs
Agent-first CLI for Proton Mail. Schema manifest, NDJSON, typed errors, stable exit codes.
Go★ 0Jul 17, 2026
Apache-2.0Jul 17, 2026 · metrics 1.13.0