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. Microsoft never released a version named "Office 2020"
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints. 64-bit processor 4 GB RAM (or more) 4
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures. Microsoft never released a version named "Office 2020"
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.
Searching for "Office 2020 full español activador 64 bits" is a common way users try to find a free, activated version of Microsoft's productivity suite. However, it is important to clarify that . The primary releases around that time were Office 2019 (released in 2018) and Office 2021 . The Risks of "Activators" and Unofficial Downloads
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
Searching for "Office 2020 full español activador 64 bits" is a common way users try to find a free, activated version of Microsoft's productivity suite. However, it is important to clarify that . The primary releases around that time were Office 2019 (released in 2018) and Office 2021 . The Risks of "Activators" and Unofficial Downloads
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.