MailCatcher NG
MailCatcher NG runs a super simple SMTP server which catches any message sent to it to display in a web interface. Point your app's SMTP settings at mailcatcher-ng:1025 and inspect every captured email in the browser.
System Specifications & Architecture
Core Architectural Capabilities
Enterprise & Business Deployment Scenarios
Cost Optimization & Subscription Elimination
Replace recurring per-seat cloud SaaS fees by self-hosting MailCatcher NG on existing VPS or private cloud instances, achieving immediate infrastructure cost savings.
Target: Startups & Growing Tech Companies
Strict Data Sovereignty & Regulatory Compliance
Operate MailCatcher NG entirely within your private VPC boundaries. Ensure all intellectual property and sensitive customer records never leave company servers.
Target: Healthcare, Finance & GDPR/HIPAA Regulated Firms
White-Label & Custom Client Solutions
Deploy custom, branded instances of MailCatcher NG directly into your clients' environments as high-margin managed infrastructure services.
Target: Digital Agencies, DevOps & Systems Integrators
Private Internal Tooling Behind VPN
Host MailCatcher NG securely behind WireGuard, Tailscale, or Cloudflare Zero Trust without public exposure, providing safe, high-speed intranet tools for staff.
Target: Engineering, IT & Security Teams



