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.
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints.
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures.
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.
Fingerprint registration might occasionally feel slightly slower than it did on native ColorOS. Recalibrating your prints in a well-lit room usually fixes responsiveness.
Released by Xiaomi in 2016, MIUI 8 was a major milestone for the company’s software. It introduced a host of innovative features that were ahead of their time:
Swipe right to confirm the flash. Wait a few minutes for the installation to complete. Step 5: Flash Google Apps (GApps) miui 8 oppo f1s
This happens if the wrong GApps architecture was chosen. Ensure you are using an ARM64 GApps package matching the exact Android base version of your MIUI 8 build. Conclusion
If your phone hangs on the boot animation for longer than 20 minutes, boot back into TWRP recovery, perform a factory reset, and re-flash the ROM file. NVRAM Warning Error It introduced a host of innovative features that
MIUI is renowned for its feature-heavy nature. Switching to MIUI 8 provided the
Creating a separate user profile (a "phone within a phone"). Ensure you are using an ARM64 GApps package
Before analyzing compatibility, it's important to understand what made MIUI 8 so desirable in its era. Launched in 2016 to much acclaim, MIUI 8 was hailed as a "milestone" by Xiaomi's CEO, introducing over 40 major new features and countless optimizations.
If you want to breathe new life into your device, flashing is one of the best choices you can make. MIUI 8 brings Xiaomi's feature-rich ecosystem, fluid animations, and aggressive battery optimizations directly to your Oppo hardware.
Ensure your phone is charged to at least 60% to prevent it from shutting down mid-process.
Once the setup screen appears, follow the on-screen instructions to select your language, connect to Wi-Fi, and log into your accounts. Troubleshooting Common Issues
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
Fingerprint registration might occasionally feel slightly slower than it did on native ColorOS. Recalibrating your prints in a well-lit room usually fixes responsiveness.
Released by Xiaomi in 2016, MIUI 8 was a major milestone for the company’s software. It introduced a host of innovative features that were ahead of their time:
Swipe right to confirm the flash. Wait a few minutes for the installation to complete. Step 5: Flash Google Apps (GApps)
This happens if the wrong GApps architecture was chosen. Ensure you are using an ARM64 GApps package matching the exact Android base version of your MIUI 8 build. Conclusion
If your phone hangs on the boot animation for longer than 20 minutes, boot back into TWRP recovery, perform a factory reset, and re-flash the ROM file. NVRAM Warning Error
MIUI is renowned for its feature-heavy nature. Switching to MIUI 8 provided the
Creating a separate user profile (a "phone within a phone").
Before analyzing compatibility, it's important to understand what made MIUI 8 so desirable in its era. Launched in 2016 to much acclaim, MIUI 8 was hailed as a "milestone" by Xiaomi's CEO, introducing over 40 major new features and countless optimizations.
If you want to breathe new life into your device, flashing is one of the best choices you can make. MIUI 8 brings Xiaomi's feature-rich ecosystem, fluid animations, and aggressive battery optimizations directly to your Oppo hardware.
Ensure your phone is charged to at least 60% to prevent it from shutting down mid-process.
Once the setup screen appears, follow the on-screen instructions to select your language, connect to Wi-Fi, and log into your accounts. Troubleshooting Common Issues
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.