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Activate TLS 1.0

To establish a successful connection, you need to activate TLS 1.0.

Overview

Step 1

 Currently, for a successful connection, some values have to be set.

To do this, navigate to:

Menu -> Edit -> Preferences -> General -> Config Editor...

Overview

Step 2

Click on: "I accept the risk!"

Overview

Step 3

Search for: "tls.ver"

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Step 4

Change the settings to the described values below.

security.tls.version.enable-deprecated = true

security.tls.version.min = 1

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Step 5

Afterwards, restart Thunderbird.

Overview