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.
Adobe Creative Suite 6 (CS6) Master Collection represents a pivotal moment in software history, serving as the final "perpetual license" release before Adobe transitioned to the Creative Cloud subscription model in 2013. Distributed for macOS as a .dmg (Apple Disk Image) file, it remains a landmark for professionals who prefer local software ownership.
The Master Collection is the most comprehensive tier of the CS6 lineup, combining tools from the Design, Web, and Production Premium editions. Adobe Speedgrade Adobe Creative Suite CS6 Master Collection -Dmg...
If you already own a CS6 license, download the official DMG from Adobe, archive it on two external drives, and dedicate an old Mac to run your CS6 workflow. If you are starting fresh, subscribe to Creative Cloud for one month, export all your legacy projects, and move forward. Core Components Adobe Creative Suite 6 (CS6) Master
: Premiere Pro CS6, After Effects CS6, Audition CS6, SpeedGrade CS6, Prelude CS6, and Encore CS6. Adobe Speedgrade Our recommendation: If you already own
Adobe still provides legitimate DMG downloads— if you have a valid serial number . You cannot buy CS6 from Adobe anymore (sales ended in 2017), but existing owners can access their installers.
Why, in an era dominated by the Adobe Creative Cloud (CC), would anyone hunt for a disk image (DMG) of a suite released over a decade ago? The answer lies in performance, ownership, and hardware constraints.
Leo knew he couldn't just double-click the installer. Modern macOS versions (like Catalina and later) dropped support for 32-bit apps and older installers. To get his .dmg to work, he had to set up a running an older operating system like macOS High Sierra.
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
Adobe Creative Suite 6 (CS6) Master Collection represents a pivotal moment in software history, serving as the final "perpetual license" release before Adobe transitioned to the Creative Cloud subscription model in 2013. Distributed for macOS as a .dmg (Apple Disk Image) file, it remains a landmark for professionals who prefer local software ownership.
The Master Collection is the most comprehensive tier of the CS6 lineup, combining tools from the Design, Web, and Production Premium editions. Adobe Speedgrade
If you already own a CS6 license, download the official DMG from Adobe, archive it on two external drives, and dedicate an old Mac to run your CS6 workflow. If you are starting fresh, subscribe to Creative Cloud for one month, export all your legacy projects, and move forward.
: Premiere Pro CS6, After Effects CS6, Audition CS6, SpeedGrade CS6, Prelude CS6, and Encore CS6.
Adobe still provides legitimate DMG downloads— if you have a valid serial number . You cannot buy CS6 from Adobe anymore (sales ended in 2017), but existing owners can access their installers.
Why, in an era dominated by the Adobe Creative Cloud (CC), would anyone hunt for a disk image (DMG) of a suite released over a decade ago? The answer lies in performance, ownership, and hardware constraints.
Leo knew he couldn't just double-click the installer. Modern macOS versions (like Catalina and later) dropped support for 32-bit apps and older installers. To get his .dmg to work, he had to set up a running an older operating system like macOS High Sierra.
Verify SMTP servers, test API providers, inspect TLS certificates, and diagnose delivery issues. No cost, no limits.