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As of Global Capture 2.1.2.104 or higher. You can send emails over TLS or SSL by adding this line to the Global Capture config file in the key area. Anywhere in the key area is fine. There have been continued GlobalCapture TLS related updates as versions have progressed. You will need to upgrade to a newest version of GlobalCapture.
C:\GetSmart\CaptureServices\GlobalCapture_1 Square9.GlobalCapture.exe
<add key="EnforceTLS12" value="true"></add>
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