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One specific e-mail always goes into TB spam folder & moving to inbox & marking it "not junk" does no good, even done repeatedly w/ many of that address.so

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Computer is Win 10, 64 bit, (upgraded from Win 8, 32 bit. Computer shop installed programs from Win XP ,32 bit. Thunderbird shows as version 52.9.1, 32 bit. To my knowledge, no spam filters have been installed. I know there is no "not spam" button, but TB sites refer to "junk", "not junk" & "spam" in a confusing procedure to deal with the problem. Would deleting Thunderbird 52.9.1 (32 bit), and Installing the latest TB 64 bit version be of benefit? Will I always be faced with this problem because TB does not have a "not spam" button? Is there an app. to provide the "spam" / "spam" situation?

Computer is Win 10, 64 bit, (upgraded from Win 8, 32 bit. Computer shop installed programs from Win XP ,32 bit. Thunderbird shows as version 52.9.1, 32 bit. To my knowledge, no spam filters have been installed. I know there is no "not spam" button, but TB sites refer to "junk", "not junk" & "spam" in a confusing procedure to deal with the problem. Would deleting Thunderbird 52.9.1 (32 bit), and Installing the latest TB 64 bit version be of benefit? Will I always be faced with this problem because TB does not have a "not spam" button? Is there an app. to provide the "spam" / "spam" situation?

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Thunderbird does not mark messages as spam. It does not use a spam folder. It has no reason to have a Not Spam button. Sounds like you are another Yahoo customer or the customer of a provider that uses Yahoo. This is a know issue with Yahoo.

There is no 64bit version.

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Hi Delbe, I think what Airmail is saying is that there is another filter moving the message to your spam folder, not Thunderbird's junk filtering. Can you access your messages using a website? If so, try checking the website for a spam filter that has been enabled, and try disabling it.