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Why do regularly used names in my address book suddenly disappear?

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  • Paskiausią atsakymą parašė Nunz

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I have been experiencing sudden disappearances of random names in my address book. As well...their e-mails in my in box disappear as well...as though they never existed!

I have been experiencing sudden disappearances of random names in my address book. As well...their e-mails in my in box disappear as well...as though they never existed!

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What version of Thunderbird? What OS?

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Windows 10...Thunderbird version 45.7.0. I have always updated when asked. This has been going on for quite some time.