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. 1509 dvbt2 512m firmware update hot
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints. If you encounter problems during the update, check
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures. Troubleshooting Common Update Issues Always back up your
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.
If you encounter problems during the update, check these common fixes:
Use a 4GB or 8GB USB 2.0 drive formatted to FAT32.
Regular updates are more than just a maintenance task; they unlock the full potential of your hardware:
A progress bar will appear. Do not touch the remote or the power button until the box reboots itself. Troubleshooting Common Update Issues
Always back up your current channel list to USB before updating. Firmware updates often factory reset the device, and having a backup will save you from having to manually rescan and reorder your favorite TV stations. The of your receiver (e.g., T2, Mercury, etc.)
Enjoy smoother menu transitions and better-translated On-Screen Display (OSD) languages. Prerequisites Before You Start
Updating firmware carries a small risk. To ensure a successful flash, prepare the following:
Ensure the firmware is specifically for the 1509 512M configuration. Using firmware meant for the 1506 or a 1GB RAM version will cause a mismatch error. How to Update Your 1509 DVBT2 Receiver
Any you are hoping to fix (like YouTube or specific channel reception)
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
If you encounter problems during the update, check these common fixes:
Use a 4GB or 8GB USB 2.0 drive formatted to FAT32.
Regular updates are more than just a maintenance task; they unlock the full potential of your hardware:
A progress bar will appear. Do not touch the remote or the power button until the box reboots itself. Troubleshooting Common Update Issues
Always back up your current channel list to USB before updating. Firmware updates often factory reset the device, and having a backup will save you from having to manually rescan and reorder your favorite TV stations. The of your receiver (e.g., T2, Mercury, etc.)
Enjoy smoother menu transitions and better-translated On-Screen Display (OSD) languages. Prerequisites Before You Start
Updating firmware carries a small risk. To ensure a successful flash, prepare the following:
Ensure the firmware is specifically for the 1509 512M configuration. Using firmware meant for the 1506 or a 1GB RAM version will cause a mismatch error. How to Update Your 1509 DVBT2 Receiver
Any you are hoping to fix (like YouTube or specific channel reception)
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.