#smtp (30 Repositories)
Ranked open-source repositories tagged with #smtp, scored by pull request acceptance likelihood and maintainer engagement velocity.
77.3%
14.2h
30 repositories tagged #smtp
inbucket/inbucket
Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.
cypht-org/cypht
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
reloop-labs/reloop
Open-source transactional email API and self-hostable Resend alternative. SMTP, inbound mail, webhooks, and campaigns for developers.
djkurlander/knock-knock
Knock-Knock: A Live, Multi-Protocol Honeypot Dashboard of Internet Break-in Attempts - 13 Protocols, an Extensible Framework, and a Threat-Intelligence Database Serving a Public IP Blocklist Feed
nextcloud/mail
💌 Mail app for Nextcloud
chatmail/core
Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧
tokencanopy/e2a
Open-source email API for applications and AI agents. Managed hosting at e2a.dev, or self-host with Docker.
AfterShip/email-verifier
:white_check_mark: A Go library for email verification without sending any emails.
kurrier-org/kurrier
Kurrier is a modern, self-hosted workspace for email, calendar, contacts and storage.
micro/mu
The runtime for Micro, an open personal assistant
jdrouet/catapulte
Rust implementation of catapulte email sender
sj26/mailcatcher
Catches mail and serves it through a dream.
veliovgroup/mail-time
📮 Email queue extending NodeMailer with multi SMTP transports and horizontally scaled applications support
apache/james-project
Emails at the heart of your business logic!
docker-mailserver/docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.
deltachat/deltachat-desktop
Decentralized private messenger with chat-shared tools and games for Desktop
hyvor/relay
📨 Open-Source Email API for Developers. Cloud & Self-hosted Alternative to SES, Mailgun, SendGrid.
ChangemakerStudios/Papercut-SMTP
Papercut SMTP -- The Simple Desktop Email Server
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.
emersion/go-smtp
📤 An SMTP library for Go clients and servers
pimalaya/himalaya
CLI to manage emails
Progressiverobot/hmailserver
hMailServer 6.3 — modernized email server for Windows and linux (SMTP/IMAP/POP3, OpenSSL 4, MTA-STS, DANE/DNSSEC, ARC, ACME, REST API). AGPLv3.
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.
larksuite/aamp
Mailbox-native protocol and SDKs for asynchronous agent collaboration over email
buggregator/trap
A local debug server and utilities set for PHP projects
greenmail-mail-test/greenmail
Official master for the Greenmail project
smtpd/qpsmtpd
qpsmtpd is a flexible smtpd daemon written in Perl
danzuep/MailKitSimplified
Send and receive emails easily, fluently, with one line of code for each operation.
postalserver/postal
📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail
foxcpp/maddy
✉️ Composable all-in-one mail server.