There are two computers at my company that are Macs. We just both upgraded to El Capitan OS, and had to change our mail accounts from POP to IMAP to work with the Parallels that we run. Ever since we did that, both of our mail accounts have been in sync with one another. Whenever he reads an email on his computer from our General Mailbox, it shows up on my computer as "Read" already.

It's getting very frustrating, because we feel as though things are starting to slip through the cracks.

Is there a way to reverse this?

  • 3
    Do you share ONE email address between the two of you? If so, IMAP is working as designed.
    – IconDaemon
    Commented Jan 5, 2016 at 15:21

1 Answer 1


That's what IMAP does, it keeps the client state in sync. So it's doing exactly what it should. You can switch back to POP to get the old behaviour.

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