From: Thérèse Godefroy
If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.
+Enigmail versions prior to 2.0.6 have serious security issues. Make sure +to install version 2.0.6 or later. The current version is 2.0.6.1.
+For greater security against potential attacks, you can turn off +HTML. Instead, you can render the message body as plain text. In order +to do this in Thunderbird, go to View > Message Body As > Plain +Text.
+ + +For greater security against potential attacks, you can turn off +HTML. Instead, you can render the message body as plain text.
+ +