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. Adobe Acrobat Pro DC 2019.010.20100 Ml
View full certificate chains including protocol version, cipher suite, issuer details, validity dates, and SHA-256 fingerprints. While the industry has moved toward subscription models,
24-code error database with actionable troubleshooting hints. Port connectivity testing detects ISP blocking, firewall issues, and DNS failures. The 2019
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.
While the industry has moved toward subscription models, this specific build stands as a testament to a time when "owning" your software was the standard. If you are still running this version on an older machine, it continues to be a reliable workhorse for editing, signing, and protecting your documents.
Specific build numbers matter. The 2019.010.20100 release was notable because it addressed several critical security vulnerabilities found in earlier builds of Acrobat.
To run this version effectively, your system generally needs: Processor: 1.5GHz or faster. 1GB (2GB or more recommended). Hard Disk Space: 4.5GB of available space. 1024x768 screen resolution. Operating System: Windows 7, 8, 8.1, 10, or 11. or are you trying to compare it to a newer version of Acrobat? Adobe Acrobat on desktop release notes
Unless you are running a legacy Windows Server 2008 R2 environment that cannot support the newer Visual C++ runtimes required by Acrobat 2020+, you should move to the Continuous Track or at least the final Classic Track build (2019.021.20061).
: Using Optical Character Recognition to make scanned documents searchable and editable.
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
While the industry has moved toward subscription models, this specific build stands as a testament to a time when "owning" your software was the standard. If you are still running this version on an older machine, it continues to be a reliable workhorse for editing, signing, and protecting your documents.
Specific build numbers matter. The 2019.010.20100 release was notable because it addressed several critical security vulnerabilities found in earlier builds of Acrobat.
To run this version effectively, your system generally needs: Processor: 1.5GHz or faster. 1GB (2GB or more recommended). Hard Disk Space: 4.5GB of available space. 1024x768 screen resolution. Operating System: Windows 7, 8, 8.1, 10, or 11. or are you trying to compare it to a newer version of Acrobat? Adobe Acrobat on desktop release notes
Unless you are running a legacy Windows Server 2008 R2 environment that cannot support the newer Visual C++ runtimes required by Acrobat 2020+, you should move to the Continuous Track or at least the final Classic Track build (2019.021.20061).
: Using Optical Character Recognition to make scanned documents searchable and editable.
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.