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. cobalt strike 47 cracked download 2021 link
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints. When you search for a "cracked" version of
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures. cobalt strike 47 cracked download 2021 link
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.
When you search for a "cracked" version of a professional security tool like Cobalt Strike, you are often entering a ecosystem controlled by malicious actors. 1. The "Backdoor" Trap
The "cracked" software often contained pre-configured "Beacons" (Cobalt Strike's signature payload) that called back to a Command and Control (C2) server owned by the person who provided the crack.
Better ways to disguise command-and-control traffic.
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
When you search for a "cracked" version of a professional security tool like Cobalt Strike, you are often entering a ecosystem controlled by malicious actors. 1. The "Backdoor" Trap
The "cracked" software often contained pre-configured "Beacons" (Cobalt Strike's signature payload) that called back to a Command and Control (C2) server owned by the person who provided the crack.
Better ways to disguise command-and-control traffic.
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.