The Mozilla's mail client Thunderbird, that was one day a great mail client, that is suffering from functional (exchange integration missing) and design problems (especially the search is awful) does not include "Google" among the possible application's search engines.
Google, by the way, remarked that Thunderbird would not correspond to the "latest security standards".
Does Mozilla plan to seriously upgrade his mail client, or should the Thunderbird users look for something better?
I understand the question is subjective, but I am rather asking about the objective opinion on Thuerdenbird's future as mail client than a subjective opinion about how good it is.