stalwartlabs / stalwart

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

pimalaya / himalaya

CLI to manage emails

telemt / telemt

MTProxy for Telegram on Rust + Tokio

lettre / lettre

a mailer library for Rust

flectar / mail

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 80 MB of RAM.

chatmail / core

Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧

KumoCorp / kumomta

The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments.

adrgs / requestrepo

Analyze HTTP, DNS and SMTP requests and create custom responses and DNS records for your subdomain

rustmailer / rustmailer

A self-hosted Email Middleware for IMAP, SMTP, Gmail API, Graph API — built for developers

truespar / sentio

Email inbox API for AI agents. Give every agent its own real email address, receive mail as structured webhooks, and reply in-thread over REST. A complete multi-tenant mail server in Rust: inbound and outbound, DKIM/SPF/DMARC/ARC, MTA-STS, DANE, three-tier anti-spam.

DingoOz / llm-visuals

Live truecolor terminal dashboard for a locally running LLM: tok/s, TTFT, GPUs, context, MTP acceptance, layer and real expert routing (llama.cpp)

UCS-Care-Group / mailcraft

MailCraft: an open-source, clean-room mail, calendar and contacts program (Outlook-style) in pure Rust, for Microsoft 365, Outlook.com and IMAP. Early alpha.

gavindi / lookout

Lookout is a native GNOME mail client written in Rust on GTK 4 — mail, calendar, contacts and tasks in one window, laid out the way you already know. Accounts come from GNOME Online Accounts, or add your own IMAP/SMTP server directly.