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Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.
Join UsVersion 52.2.1, first offered to channel users on June 23, 2017
Problems with Gmail (folders not showing, repeated email download, etc.) introduced in version 52.2.0.
On Windows, "Send to > Mail recipient" does not work. Workaround: Install the Microsoft Visual Studio 2015 redistributable runtime library or the Universal C Runtime for Windows Server.
Multiple requests for master password when GMail OAuth2 is enabled.