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Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

I am getting thousands of duplicate emails from years past and thunderbird is crashing

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Can't send or receive email because it says mailbox is full even after I delete 15000 email that came in. This is happening for more then person.

Can't send or receive email because it says mailbox is full even after I delete 15000 email that came in. This is happening for more then person.

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Do you compact the folders after emptying the trash? You should compact regularly. http://kb.mozillazine.org/Keep_it_working_-_Thunderbird