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. Tatiana Manaois has long been the voice for
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints. Across 12 tracks, she weaves a narrative that
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures. Across 12 tracks
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.
Tatiana Manaois has long been the voice for those who find solace in solitude, and her 2019 project, stands as her most definitive exploration of that quiet strength. For fans searching for the latest ways to experience this collection, this updated guide covers everything from the album's themes to where you can stream or download it legally. Album Overview: The Heart of an Introvert
Released on , Love Diaries of an Introvert is Manaois’s third full-length album. Across 12 tracks, she weaves a narrative that balances the desire for deep connection with the inherent need for personal space. The album serves as a sonic "mirror" for listeners who navigate the complexities of love while protecting their inner peace. Official Tracklist:
Love Diaries of an Introvert - Album by Tatiana Manaois - Apple Music
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
Tatiana Manaois has long been the voice for those who find solace in solitude, and her 2019 project, stands as her most definitive exploration of that quiet strength. For fans searching for the latest ways to experience this collection, this updated guide covers everything from the album's themes to where you can stream or download it legally. Album Overview: The Heart of an Introvert
Released on , Love Diaries of an Introvert is Manaois’s third full-length album. Across 12 tracks, she weaves a narrative that balances the desire for deep connection with the inherent need for personal space. The album serves as a sonic "mirror" for listeners who navigate the complexities of love while protecting their inner peace. Official Tracklist:
Love Diaries of an Introvert - Album by Tatiana Manaois - Apple Music
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.