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I read GMail on Thunderbird. But the "Sent" messages have stopped showing in Thunderbird. How do I fix this?

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I use GMail via Thunderbird, which is installed on both my PC (Windows) and my iPhone. All the messages in the Inbox and Sent folders continue to appear in my regular GMail account AND in the Thunderbird GMail account on my iPhone. In the Thunderbird GMail account on my computer, the Inbox continues to work fine, and new messages I send continue to appear in the Send file. HOWEVER, all the messages in the Sent file created BEFORE 8/21 no longer show. How do I fix this? (I recently changed my GMail password. Could that be somehow related to this problem--even though the problem appears ONLY in the Thunderbird GMail account on my computer?)

I use GMail via Thunderbird, which is installed on both my PC (Windows) and my iPhone. All the messages in the Inbox and Sent folders continue to appear in my regular GMail account AND in the Thunderbird GMail account on my iPhone. In the Thunderbird GMail account on my computer, the Inbox continues to work fine, and new messages I send continue to appear in the Send file. HOWEVER, all the messages in the Sent file created BEFORE 8/21 no longer show. How do I fix this? (I recently changed my GMail password. Could that be somehow related to this problem--even though the problem appears ONLY in the Thunderbird GMail account on my computer?)

All Replies (2)

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I've moved this to the Thunderbird forum.

In the meantime, please update to Firefox 61.0.2 or later. Firefox 52 is no longer supported. Update Firefox to the latest release

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I stumbled on a solution. The messages in the "Sent" file that appear in my Thunderbird gmail account are all labeled "smtp.gmail.com/Sent" in the original gmail account. But for some reason, all the "Sent" messages before 8/21/2018 had lost that label. When I manually re-labeled them "smtp.gmail.com/Sent" , that seems to have solved the problem.