smtp4dev on Ubuntu 24.04

Azure Streaming & Messaging

smtp4dev, a fake SMTP server that captures outbound mail from your apps, ready to inspect every message in a web UI from 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

Overview

smtp4dev is a fake, developer focused SMTP server with a modern web interface. It catches email sent by applications during development and testing, shows every message with its HTML, text, source, headers and attachments, and never delivers mail to real recipients. A built in IMAP server also lets standard mail clients browse the captured messages.

Why the cloudimg image

cloudimg delivers smtp4dev hardened and fully patched on Ubuntu 24.04 LTS, with the web interface protected by a unique password generated on first boot, its message store on a dedicated data volume, and a paired deployment guide. 24/7 support is included with every image.

Common uses

  • Email testing in development
  • SMTP capture and inspection
  • Previewing outbound application mail

See it running

Real screenshots taken while testing this image against its deployment guide.

smtp4dev on Ubuntu 24.04 screenshot 1 smtp4dev on Ubuntu 24.04 screenshot 2 smtp4dev on Ubuntu 24.04 screenshot 3 smtp4dev on Ubuntu 24.04 screenshot 4

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