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由 Benjamin 发表于 July 10, 2015 · 永久链接

If one is experiencing the greyed out Send button with 1.4.4 (I am), one can download the old 1.4.3 version and then disable automatic updates. 1.4.3 is available from:
https://addons.mozilla.org/en-US/thunderbird/addon/correct-identity/versions/