E

email

terminal e-mail client and e-mail client library https://meli-email.org

Simple and complete declarative NixOS Mailserver setups

Declarative, idempotent mail server configuration script

DMARC library and milter module implemented in Python.

amavis is a high-performance email content filter framework written in Perl.

Confirmation-first Go TUI for safely preparing and sending personalized, multilingual mailing-list campaigns through Postmark.

EmailXpose is an open source AI-powered email security system that detects phishing, spam, scams, malware, and social engineering attacks. It goes beyond traditional email filters by combining natural language processing, behavioral analysis, and multi-modal intelligence to analyze text, images, and video content. The system also includes advanced features like sender trust scoring, attachment sandboxing, explainable risk reports, and symbolic/contextual interpretation of email content. Its goal is to provide transparent, privacy-first “AI-powered email clarity” so users can understand both threats and intent behind every message. https://roxanneardary.com/emailxpose/

MailKeeper is a modular, open source AI email assistant designed to help users organize, search, manage, and protect their digital communications. It combines intelligent email classification, sender and company organization, security analysis through EmailXpose, document and receipt intelligence, retention management, unsubscribe assistance, outgoing email protection, contact management, voice and video communication, and human-in-the-loop controls that keep users in charge of consequential actions. https://roxanneardary.com/mailkeeper/

unsubd.dev — stateless Go service that executes newsletter unsubscribes on your behalf, bypassing DNS sinkholes

Microsoft Social Login plugin for RosarioSIS. User login using Microsoft as an external identity provider (through the OAuth 2.0 protocol).

Preserve your emails for with this open-source self-hostable email archive!

SMTP (email) server with a focus on simplicity, security, and ease of operation [mirror]

spf is an open source implementation of the Sender Policy Framework (SPF) in Go.

It is used by the chasquid and maddy SMTP servers.

Multi-mailbox IMAP/SMTP control plane. One YAML, N accounts, one bearer-auth gate. Unified inbox across Gmail/Outlook/iCloud/mailo/inbox.lv/whatever — search, read, mark, send. Reader mode strips HTML chrome for LLMs. Streamable-HTTP MCP server + REST API on one port. Ships as a Docker image.

A cross-platform, open-source GUI tool for syncing emails between email providers using the IMAP protocol. Mail Hermit runs locally on your computer and uses only your computer to securely transfer your emails from one provider to another.

Mail protocol for the small web https://misfin.gitlab.io/

Kotlin Service to send an email over SMTP

Zero-OAuth email-to-Telegram relay. Encrypted aliases, Ed25519-signed gRPC ingress, priority-queued MTProto delivery in under 2 seconds.

Systemd failure notification framework using template units (@) and journal log harvesting piped to msmtp.

Tiny Go client for Postmark's SpamCheck API: submit a raw email, get its SpamAssassin spam score and matched-rule breakdown. No account or API key required.