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Thunderbird 31 - IMAP - leave copies of emails on server

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Does anyone know how to set up Thunderbird 31 so that it leaves a copy of emails on the server? I'm using IMAP not POP. thx

Does anyone know how to set up Thunderbird 31 so that it leaves a copy of emails on the server? I'm using IMAP not POP. thx

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IMAP email is server based. The emails are always on the server and this is why there is no check box in Thunderbird options to leave messages on the server with IMAP.

With IMAP you are just remotely viewing the messages on the server. I am guessing that you delete the message you are viewing on your computer and then wondering why it is gone from the server. That is how IMAP works.