If you check the toolbar, does it contain a button for encryption/signing? If no, right-click the toolbar, click on "Customize" and click on "Restore default set". Does that help?
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Thank you for your recommendation. But, the problem remains.
When I sending or getting mail, add-on Enigmail is not displayed and messages arrive unencrypted.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
What I previously did (use Windows 10/ Ubuntu/ Mint):
Install Thunderbird Setup 60.3.0
Install exquilla_for_microsoft_exchange-60.0-tb (Add my exchange account)
Install enigmail-2.0.8-sm+tb (Install GnuPG, create keys)
But, when I sending or getting mail, add-on Enigmail is not displayed and messages arrive unencrypted.
Please, help me resolve this technical problem.
If you check the toolbar, does it contain a button for encryption/signing? If no, right-click the toolbar, click on "Customize" and click on "Restore default set". Does that help?
Thank you for your recommendation. But, the problem remains.
When I sending or getting mail, add-on Enigmail is not displayed and messages arrive unencrypted.