SMTP & Email API Test Utility
A free, native tool for testing SMTP relay servers and email API providers. Built for email administrators, developers, and IT professionals who need to quickly verify email delivery configurations.
Windows, macOS & CLI available now
Clean, intuitive interface designed for professionals. Test SMTP servers, preview HTML emails, and diagnose delivery issues.
Main Interface - SMTP Configuration
Send test emails through any SMTP server or choose from 12 integrated API providers. Inspect TLS certificates, diagnose delivery issues, and securely store credentials.
Save SMTP and API credentials securely with AES-256-GCM encryption. Master password protection keeps your credentials safe between sessions. nms save editor ban
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints. No, using a save editor in No Man's
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures. Backup original save files
Compose in plain text or HTML with auto-detection. Live preview with rendered and raw source views. 6 preloaded templates included.
One-click sending via SendGrid, Mailgun, Amazon SES, Postmark, Brevo, and 7 more providers with built-in authentication handling.
No analytics, no tracking, no data collection. Your credentials stay local. App Sandbox enabled for maximum security.
One-click API-based sending with all major email service providers. Authentication handled automatically.
No, using a save editor in No Man's Sky (NMS) will not get you banned from the game. Because the game is a non-competitive sandbox focused on individual exploration, Hello Games does not use anti-cheat software or enforcement systems for save manipulation. Key Facts About Save Editing
because the game is primarily a non-competitive sandbox. While some consider it "cheating," there is no built-in anti-cheat or ban system for these tools. However, using them to grief other players
Hello Games does not have an anti-cheat system or a ban infrastructure for gameplay modifications. Because the game is primarily a non-competitive sandbox, players are free to use tools like save editors and mods without penalty. Why It's Safe
Live HTML Email Preview
6 Pre-loaded Email Templates
No subscriptions, no limitations, no strings attached.
Windows 10/11 (x64)
Version 1.0.7.0
macOS 14.0+ (Universal)
Version 1.08
Python (Cross-platform)
Open Source
No, using a save editor in No Man's Sky (NMS) will not get you banned from the game. Because the game is a non-competitive sandbox focused on individual exploration, Hello Games does not use anti-cheat software or enforcement systems for save manipulation. Key Facts About Save Editing
because the game is primarily a non-competitive sandbox. While some consider it "cheating," there is no built-in anti-cheat or ban system for these tools. However, using them to grief other players
Hello Games does not have an anti-cheat system or a ban infrastructure for gameplay modifications. Because the game is primarily a non-competitive sandbox, players are free to use tools like save editors and mods without penalty. Why It's Safe
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.