Stalwart

AWS Azure Streaming & Messaging 2 variations

Stalwart, an all in one open source mail server in a single Rust binary, with a per instance admin password on first boot.

Base
Hardened build
minimal ports, security patches applied at build time
Access
Unique credentials
generated on first boot, readable only by root
Verified
Boots working
services pass a health gate before release
Support
24/7, 365 days
by email and live chat, 24 hour response SLA

Variations

Choose the operating system, cloud and version you need. Every variation is the same hardened Stalwart image, built and supported by cloudimg.

ProductCloudOperating systemVersion
Stalwart Mail Server - All-in-One SMTP/IMAP/JMAP on EC2 AWS Standard View · Guide
Stalwart on Ubuntu 24.04 LTS Azure Ubuntu 24.04 Standard View · Guide

Overview

Stalwart is an open source mail server that combines SMTP, IMAP and JMAP with spam filtering, DKIM signing and SPF, DMARC and ARC verification in a single Rust binary. It provides a complete private email platform with a built in web admin console.

Why the cloudimg image

The cloudimg image is hardened and fully patched with Stalwart served behind nginx and no shared credentials, since a per instance administrator password and TLS key are generated on first boot. The RocksDB mail store sits on its own resizable data disk, and 24/7 cloudimg support covers DNS, DKIM and TLS setup.

Common uses

  • Private email hosting
  • SMTP and IMAP services
  • Domain mail delivery